ちょっと個人的興味。
家系図に興味があって、親が管理していたものをみる。あまり古くは辿れなかったものの、それでも江戸時代までは遡れて。ただ、どの元号がどのくらい続いたのかの感覚的なものがないから、時代感覚がつかめなくて。
ひとまず：
gengo_rellist.py (4月3日改)
1 # -*- coding: utf-8 -*-
2 GENGO_RELLIST = [
3 (1394, [(u'', (1394, 8, 2)), (u'応永', (1428, 6, 10))]),
4 (1395, [(u'応永', (1428, 6, 10))]),
5 (1396, [(u'応永', (1428, 6, 10))]),
6 (1397, [(u'応永', (1428, 6, 10))]),
7 (1398, [(u'応永', (1428, 6, 10))]),
8 (1399, [(u'応永', (1428, 6, 10))]),
9 (1400, [(u'応永', (1428, 6, 10))]),
10 (1401, [(u'応永', (1428, 6, 10))]),
11 (1402, [(u'応永', (1428, 6, 10))]),
12 (1403, [(u'応永', (1428, 6, 10))]),
13 (1404, [(u'応永', (1428, 6, 10))]),
14 (1405, [(u'応永', (1428, 6, 10))]),
15 (1406, [(u'応永', (1428, 6, 10))]),
16 (1407, [(u'応永', (1428, 6, 10))]),
17 (1408, [(u'応永', (1428, 6, 10))]),
18 (1409, [(u'応永', (1428, 6, 10))]),
19 (1410, [(u'応永', (1428, 6, 10))]),
20 (1411, [(u'応永', (1428, 6, 10))]),
21 (1412, [(u'応永', (1428, 6, 10))]),
22 (1413, [(u'応永', (1428, 6, 10))]),
23 (1414, [(u'応永', (1428, 6, 10))]),
24 (1415, [(u'応永', (1428, 6, 10))]),
25 (1416, [(u'応永', (1428, 6, 10))]),
26 (1417, [(u'応永', (1428, 6, 10))]),
27 (1418, [(u'応永', (1428, 6, 10))]),
28 (1419, [(u'応永', (1428, 6, 10))]),
29 (1420, [(u'応永', (1428, 6, 10))]),
30 (1421, [(u'応永', (1428, 6, 10))]),
31 (1422, [(u'応永', (1428, 6, 10))]),
32 (1423, [(u'応永', (1428, 6, 10))]),
33 (1424, [(u'応永', (1428, 6, 10))]),
34 (1425, [(u'応永', (1428, 6, 10))]),
35 (1426, [(u'応永', (1428, 6, 10))]),
36 (1427, [(u'応永', (1428, 6, 10))]),
37 (1428, [(u'応永', (1428, 6, 10)), (u'正長', (1429, 10, 3))]),
38 (1429, [(u'正長', (1429, 10, 3)), (u'永享', (1441, 3, 10))]),
39 (1430, [(u'永享', (1441, 3, 10))]),
40 (1431, [(u'永享', (1441, 3, 10))]),
41 (1432, [(u'永享', (1441, 3, 10))]),
42 (1433, [(u'永享', (1441, 3, 10))]),
43 (1434, [(u'永享', (1441, 3, 10))]),
44 (1435, [(u'永享', (1441, 3, 10))]),
45 (1436, [(u'永享', (1441, 3, 10))]),
46 (1437, [(u'永享', (1441, 3, 10))]),
47 (1438, [(u'永享', (1441, 3, 10))]),
48 (1439, [(u'永享', (1441, 3, 10))]),
49 (1440, [(u'永享', (1441, 3, 10))]),
50 (1441, [(u'永享', (1441, 3, 10)), (u'嘉吉', (1444, 2, 23))]),
51 (1442, [(u'嘉吉', (1444, 2, 23))]),
52 (1443, [(u'嘉吉', (1444, 2, 23))]),
53 (1444, [(u'嘉吉', (1444, 2, 23)), (u'文安', (1449, 8, 16))]),
54 (1445, [(u'文安', (1449, 8, 16))]),
55 (1446, [(u'文安', (1449, 8, 16))]),
56 (1447, [(u'文安', (1449, 8, 16))]),
57 (1448, [(u'文安', (1449, 8, 16))]),
58 (1449, [(u'文安', (1449, 8, 16)), (u'宝徳', (1452, 8, 10))]),
59 (1450, [(u'宝徳', (1452, 8, 10))]),
60 (1451, [(u'宝徳', (1452, 8, 10))]),
61 (1452, [(u'宝徳', (1452, 8, 10)), (u'享徳', (1455, 9, 6))]),
62 (1453, [(u'享徳', (1455, 9, 6))]),
63 (1454, [(u'享徳', (1455, 9, 6))]),
64 (1455, [(u'享徳', (1455, 9, 6)), (u'康正', (1457, 10, 16))]),
65 (1456, [(u'康正', (1457, 10, 16))]),
66 (1457, [(u'康正', (1457, 10, 16)), (u'長禄', (1461, 2, 1))]),
67 (1458, [(u'長禄', (1461, 2, 1))]),
68 (1459, [(u'長禄', (1461, 2, 1))]),
69 (1460, [(u'長禄', (1461, 2, 1))]),
70 (1461, [(u'長禄', (1461, 2, 1)), (u'寛正', (1466, 3, 14))]),
71 (1462, [(u'寛正', (1466, 3, 14))]),
72 (1463, [(u'寛正', (1466, 3, 14))]),
73 (1464, [(u'寛正', (1466, 3, 14))]),
74 (1465, [(u'寛正', (1466, 3, 14))]),
75 (1466, [(u'寛正', (1466, 3, 14)), (u'文正', (1467, 4, 9))]),
76 (1467, [(u'文正', (1467, 4, 9)), (u'応仁', (1469, 6, 8))]),
77 (1468, [(u'応仁', (1469, 6, 8))]),
78 (1469, [(u'応仁', (1469, 6, 8)), (u'文明', (1487, 8, 9))]),
79 (1470, [(u'文明', (1487, 8, 9))]),
80 (1471, [(u'文明', (1487, 8, 9))]),
81 (1472, [(u'文明', (1487, 8, 9))]),
82 (1473, [(u'文明', (1487, 8, 9))]),
83 (1474, [(u'文明', (1487, 8, 9))]),
84 (1475, [(u'文明', (1487, 8, 9))]),
85 (1476, [(u'文明', (1487, 8, 9))]),
86 (1477, [(u'文明', (1487, 8, 9))]),
87 (1478, [(u'文明', (1487, 8, 9))]),
88 (1479, [(u'文明', (1487, 8, 9))]),
89 (1480, [(u'文明', (1487, 8, 9))]),
90 (1481, [(u'文明', (1487, 8, 9))]),
91 (1482, [(u'文明', (1487, 8, 9))]),
92 (1483, [(u'文明', (1487, 8, 9))]),
93 (1484, [(u'文明', (1487, 8, 9))]),
94 (1485, [(u'文明', (1487, 8, 9))]),
95 (1486, [(u'文明', (1487, 8, 9))]),
96 (1487, [(u'文明', (1487, 8, 9)), (u'長享', (1489, 9, 16))]),
97 (1488, [(u'長享', (1489, 9, 16))]),
98 (1489, [(u'長享', (1489, 9, 16)), (u'延徳', (1492, 8, 12))]),
99 (1490, [(u'延徳', (1492, 8, 12))]),
100 (1491, [(u'延徳', (1492, 8, 12))]),
101 (1492, [(u'延徳', (1492, 8, 12)), (u'明応', (1501, 3, 18))]),
102 (1493, [(u'明応', (1501, 3, 18))]),
103 (1494, [(u'明応', (1501, 3, 18))]),
104 (1495, [(u'明応', (1501, 3, 18))]),
105 (1496, [(u'明応', (1501, 3, 18))]),
106 (1497, [(u'明応', (1501, 3, 18))]),
107 (1498, [(u'明応', (1501, 3, 18))]),
108 (1499, [(u'明応', (1501, 3, 18))]),
109 (1500, [(u'明応', (1501, 3, 18))]),
110 (1501, [(u'明応', (1501, 3, 18)), (u'文亀', (1504, 3, 16))]),
111 (1502, [(u'文亀', (1504, 3, 16))]),
112 (1503, [(u'文亀', (1504, 3, 16))]),
113 (1504, [(u'文亀', (1504, 3, 16)), (u'永正', (1521, 9, 23))]),
114 (1505, [(u'永正', (1521, 9, 23))]),
115 (1506, [(u'永正', (1521, 9, 23))]),
116 (1507, [(u'永正', (1521, 9, 23))]),
117 (1508, [(u'永正', (1521, 9, 23))]),
118 (1509, [(u'永正', (1521, 9, 23))]),
119 (1510, [(u'永正', (1521, 9, 23))]),
120 (1511, [(u'永正', (1521, 9, 23))]),
121 (1512, [(u'永正', (1521, 9, 23))]),
122 (1513, [(u'永正', (1521, 9, 23))]),
123 (1514, [(u'永正', (1521, 9, 23))]),
124 (1515, [(u'永正', (1521, 9, 23))]),
125 (1516, [(u'永正', (1521, 9, 23))]),
126 (1517, [(u'永正', (1521, 9, 23))]),
127 (1518, [(u'永正', (1521, 9, 23))]),
128 (1519, [(u'永正', (1521, 9, 23))]),
129 (1520, [(u'永正', (1521, 9, 23))]),
130 (1521, [(u'永正', (1521, 9, 23)), (u'大永', (1528, 9, 3))]),
131 (1522, [(u'大永', (1528, 9, 3))]),
132 (1523, [(u'大永', (1528, 9, 3))]),
133 (1524, [(u'大永', (1528, 9, 3))]),
134 (1525, [(u'大永', (1528, 9, 3))]),
135 (1526, [(u'大永', (1528, 9, 3))]),
136 (1527, [(u'大永', (1528, 9, 3))]),
137 (1528, [(u'大永', (1528, 9, 3)), (u'享禄', (1532, 8, 29))]),
138 (1529, [(u'享禄', (1532, 8, 29))]),
139 (1530, [(u'享禄', (1532, 8, 29))]),
140 (1531, [(u'享禄', (1532, 8, 29))]),
141 (1532, [(u'享禄', (1532, 8, 29)), (u'天文', (1555, 11, 7))]),
142 (1533, [(u'天文', (1555, 11, 7))]),
143 (1534, [(u'天文', (1555, 11, 7))]),
144 (1535, [(u'天文', (1555, 11, 7))]),
145 (1536, [(u'天文', (1555, 11, 7))]),
146 (1537, [(u'天文', (1555, 11, 7))]),
147 (1538, [(u'天文', (1555, 11, 7))]),
148 (1539, [(u'天文', (1555, 11, 7))]),
149 (1540, [(u'天文', (1555, 11, 7))]),
150 (1541, [(u'天文', (1555, 11, 7))]),
151 (1542, [(u'天文', (1555, 11, 7))]),
152 (1543, [(u'天文', (1555, 11, 7))]),
153 (1544, [(u'天文', (1555, 11, 7))]),
154 (1545, [(u'天文', (1555, 11, 7))]),
155 (1546, [(u'天文', (1555, 11, 7))]),
156 (1547, [(u'天文', (1555, 11, 7))]),
157 (1548, [(u'天文', (1555, 11, 7))]),
158 (1549, [(u'天文', (1555, 11, 7))]),
159 (1550, [(u'天文', (1555, 11, 7))]),
160 (1551, [(u'天文', (1555, 11, 7))]),
161 (1552, [(u'天文', (1555, 11, 7))]),
162 (1553, [(u'天文', (1555, 11, 7))]),
163 (1554, [(u'天文', (1555, 11, 7))]),
164 (1555, [(u'天文', (1555, 11, 7)), (u'弘治', (1558, 3, 18))]),
165 (1556, [(u'弘治', (1558, 3, 18))]),
166 (1557, [(u'弘治', (1558, 3, 18))]),
167 (1558, [(u'弘治', (1558, 3, 18)), (u'永禄', (1570, 5, 27))]),
168 (1559, [(u'永禄', (1570, 5, 27))]),
169 (1560, [(u'永禄', (1570, 5, 27))]),
170 (1561, [(u'永禄', (1570, 5, 27))]),
171 (1562, [(u'永禄', (1570, 5, 27))]),
172 (1563, [(u'永禄', (1570, 5, 27))]),
173 (1564, [(u'永禄', (1570, 5, 27))]),
174 (1565, [(u'永禄', (1570, 5, 27))]),
175 (1566, [(u'永禄', (1570, 5, 27))]),
176 (1567, [(u'永禄', (1570, 5, 27))]),
177 (1568, [(u'永禄', (1570, 5, 27))]),
178 (1569, [(u'永禄', (1570, 5, 27))]),
179 (1570, [(u'永禄', (1570, 5, 27)), (u'元亀', (1573, 8, 25))]),
180 (1571, [(u'元亀', (1573, 8, 25))]),
181 (1572, [(u'元亀', (1573, 8, 25))]),
182 (1573, [(u'元亀', (1573, 8, 25)), (u'天正', (1593, 1, 10))]),
183 (1574, [(u'天正', (1593, 1, 10))]),
184 (1575, [(u'天正', (1593, 1, 10))]),
185 (1576, [(u'天正', (1593, 1, 10))]),
186 (1577, [(u'天正', (1593, 1, 10))]),
187 (1578, [(u'天正', (1593, 1, 10))]),
188 (1579, [(u'天正', (1593, 1, 10))]),
189 (1580, [(u'天正', (1593, 1, 10))]),
190 (1581, [(u'天正', (1593, 1, 10))]),
191 (1582, [(u'天正', (1593, 1, 10))]),
192 (1583, [(u'天正', (1593, 1, 10))]),
193 (1584, [(u'天正', (1593, 1, 10))]),
194 (1585, [(u'天正', (1593, 1, 10))]),
195 (1586, [(u'天正', (1593, 1, 10))]),
196 (1587, [(u'天正', (1593, 1, 10))]),
197 (1588, [(u'天正', (1593, 1, 10))]),
198 (1589, [(u'天正', (1593, 1, 10))]),
199 (1590, [(u'天正', (1593, 1, 10))]),
200 (1591, [(u'天正', (1593, 1, 10))]),
201 (1592, [(u'天正', (1593, 1, 10))]),
202 (1593, [(u'天正', (1593, 1, 10)), (u'文禄', (1596, 12, 16))]),
203 (1594, [(u'文禄', (1596, 12, 16))]),
204 (1595, [(u'文禄', (1596, 12, 16))]),
205 (1596, [(u'文禄', (1596, 12, 16)), (u'慶長', (1615, 9, 5))]),
206 (1597, [(u'慶長', (1615, 9, 5))]),
207 (1598, [(u'慶長', (1615, 9, 5))]),
208 (1599, [(u'慶長', (1615, 9, 5))]),
209 (1600, [(u'慶長', (1615, 9, 5))]),
210 (1601, [(u'慶長', (1615, 9, 5))]),
211 (1602, [(u'慶長', (1615, 9, 5))]),
212 (1603, [(u'慶長', (1615, 9, 5))]),
213 (1604, [(u'慶長', (1615, 9, 5))]),
214 (1605, [(u'慶長', (1615, 9, 5))]),
215 (1606, [(u'慶長', (1615, 9, 5))]),
216 (1607, [(u'慶長', (1615, 9, 5))]),
217 (1608, [(u'慶長', (1615, 9, 5))]),
218 (1609, [(u'慶長', (1615, 9, 5))]),
219 (1610, [(u'慶長', (1615, 9, 5))]),
220 (1611, [(u'慶長', (1615, 9, 5))]),
221 (1612, [(u'慶長', (1615, 9, 5))]),
222 (1613, [(u'慶長', (1615, 9, 5))]),
223 (1614, [(u'慶長', (1615, 9, 5))]),
224 (1615, [(u'慶長', (1615, 9, 5)), (u'元和', (1624, 4, 17))]),
225 (1616, [(u'元和', (1624, 4, 17))]),
226 (1617, [(u'元和', (1624, 4, 17))]),
227 (1618, [(u'元和', (1624, 4, 17))]),
228 (1619, [(u'元和', (1624, 4, 17))]),
229 (1620, [(u'元和', (1624, 4, 17))]),
230 (1621, [(u'元和', (1624, 4, 17))]),
231 (1622, [(u'元和', (1624, 4, 17))]),
232 (1623, [(u'元和', (1624, 4, 17))]),
233 (1624, [(u'元和', (1624, 4, 17)), (u'寛永', (1645, 1, 13))]),
234 (1625, [(u'寛永', (1645, 1, 13))]),
235 (1626, [(u'寛永', (1645, 1, 13))]),
236 (1627, [(u'寛永', (1645, 1, 13))]),
237 (1628, [(u'寛永', (1645, 1, 13))]),
238 (1629, [(u'寛永', (1645, 1, 13))]),
239 (1630, [(u'寛永', (1645, 1, 13))]),
240 (1631, [(u'寛永', (1645, 1, 13))]),
241 (1632, [(u'寛永', (1645, 1, 13))]),
242 (1633, [(u'寛永', (1645, 1, 13))]),
243 (1634, [(u'寛永', (1645, 1, 13))]),
244 (1635, [(u'寛永', (1645, 1, 13))]),
245 (1636, [(u'寛永', (1645, 1, 13))]),
246 (1637, [(u'寛永', (1645, 1, 13))]),
247 (1638, [(u'寛永', (1645, 1, 13))]),
248 (1639, [(u'寛永', (1645, 1, 13))]),
249 (1640, [(u'寛永', (1645, 1, 13))]),
250 (1641, [(u'寛永', (1645, 1, 13))]),
251 (1642, [(u'寛永', (1645, 1, 13))]),
252 (1643, [(u'寛永', (1645, 1, 13))]),
253 (1644, [(u'寛永', (1645, 1, 13))]),
254 (1645, [(u'寛永', (1645, 1, 13)), (u'正保', (1648, 4, 7))]),
255 (1646, [(u'正保', (1648, 4, 7))]),
256 (1647, [(u'正保', (1648, 4, 7))]),
257 (1648, [(u'正保', (1648, 4, 7)), (u'慶安', (1652, 10, 20))]),
258 (1649, [(u'慶安', (1652, 10, 20))]),
259 (1650, [(u'慶安', (1652, 10, 20))]),
260 (1651, [(u'慶安', (1652, 10, 20))]),
261 (1652, [(u'慶安', (1652, 10, 20)), (u'承応', (1655, 5, 18))]),
262 (1653, [(u'承応', (1655, 5, 18))]),
263 (1654, [(u'承応', (1655, 5, 18))]),
264 (1655, [(u'承応', (1655, 5, 18)), (u'明暦', (1658, 8, 21))]),
265 (1656, [(u'明暦', (1658, 8, 21))]),
266 (1657, [(u'明暦', (1658, 8, 21))]),
267 (1658, [(u'明暦', (1658, 8, 21)), (u'万治', (1661, 5, 23))]),
268 (1659, [(u'万治', (1661, 5, 23))]),
269 (1660, [(u'万治', (1661, 5, 23))]),
270 (1661, [(u'万治', (1661, 5, 23)), (u'寛文', (1673, 10, 30))]),
271 (1662, [(u'寛文', (1673, 10, 30))]),
272 (1663, [(u'寛文', (1673, 10, 30))]),
273 (1664, [(u'寛文', (1673, 10, 30))]),
274 (1665, [(u'寛文', (1673, 10, 30))]),
275 (1666, [(u'寛文', (1673, 10, 30))]),
276 (1667, [(u'寛文', (1673, 10, 30))]),
277 (1668, [(u'寛文', (1673, 10, 30))]),
278 (1669, [(u'寛文', (1673, 10, 30))]),
279 (1670, [(u'寛文', (1673, 10, 30))]),
280 (1671, [(u'寛文', (1673, 10, 30))]),
281 (1672, [(u'寛文', (1673, 10, 30))]),
282 (1673, [(u'寛文', (1673, 10, 30)), (u'延宝', (1681, 11, 9))]),
283 (1674, [(u'延宝', (1681, 11, 9))]),
284 (1675, [(u'延宝', (1681, 11, 9))]),
285 (1676, [(u'延宝', (1681, 11, 9))]),
286 (1677, [(u'延宝', (1681, 11, 9))]),
287 (1678, [(u'延宝', (1681, 11, 9))]),
288 (1679, [(u'延宝', (1681, 11, 9))]),
289 (1680, [(u'延宝', (1681, 11, 9))]),
290 (1681, [(u'延宝', (1681, 11, 9)), (u'天和', (1684, 4, 5))]),
291 (1682, [(u'天和', (1684, 4, 5))]),
292 (1683, [(u'天和', (1684, 4, 5))]),
293 (1684, [(u'天和', (1684, 4, 5)), (u'貞享', (1688, 10, 23))]),
294 (1685, [(u'貞享', (1688, 10, 23))]),
295 (1686, [(u'貞享', (1688, 10, 23))]),
296 (1687, [(u'貞享', (1688, 10, 23))]),
297 (1688, [(u'貞享', (1688, 10, 23)), (u'元禄', (1704, 4, 16))]),
298 (1689, [(u'元禄', (1704, 4, 16))]),
299 (1690, [(u'元禄', (1704, 4, 16))]),
300 (1691, [(u'元禄', (1704, 4, 16))]),
301 (1692, [(u'元禄', (1704, 4, 16))]),
302 (1693, [(u'元禄', (1704, 4, 16))]),
303 (1694, [(u'元禄', (1704, 4, 16))]),
304 (1695, [(u'元禄', (1704, 4, 16))]),
305 (1696, [(u'元禄', (1704, 4, 16))]),
306 (1697, [(u'元禄', (1704, 4, 16))]),
307 (1698, [(u'元禄', (1704, 4, 16))]),
308 (1699, [(u'元禄', (1704, 4, 16))]),
309 (1700, [(u'元禄', (1704, 4, 16))]),
310 (1701, [(u'元禄', (1704, 4, 16))]),
311 (1702, [(u'元禄', (1704, 4, 16))]),
312 (1703, [(u'元禄', (1704, 4, 16))]),
313 (1704, [(u'元禄', (1704, 4, 16)), (u'宝永', (1711, 6, 11))]),
314 (1705, [(u'宝永', (1711, 6, 11))]),
315 (1706, [(u'宝永', (1711, 6, 11))]),
316 (1707, [(u'宝永', (1711, 6, 11))]),
317 (1708, [(u'宝永', (1711, 6, 11))]),
318 (1709, [(u'宝永', (1711, 6, 11))]),
319 (1710, [(u'宝永', (1711, 6, 11))]),
320 (1711, [(u'宝永', (1711, 6, 11)), (u'正徳', (1716, 8, 9))]),
321 (1712, [(u'正徳', (1716, 8, 9))]),
322 (1713, [(u'正徳', (1716, 8, 9))]),
323 (1714, [(u'正徳', (1716, 8, 9))]),
324 (1715, [(u'正徳', (1716, 8, 9))]),
325 (1716, [(u'正徳', (1716, 8, 9)), (u'享保', (1736, 6, 7))]),
326 (1717, [(u'享保', (1736, 6, 7))]),
327 (1718, [(u'享保', (1736, 6, 7))]),
328 (1719, [(u'享保', (1736, 6, 7))]),
329 (1720, [(u'享保', (1736, 6, 7))]),
330 (1721, [(u'享保', (1736, 6, 7))]),
331 (1722, [(u'享保', (1736, 6, 7))]),
332 (1723, [(u'享保', (1736, 6, 7))]),
333 (1724, [(u'享保', (1736, 6, 7))]),
334 (1725, [(u'享保', (1736, 6, 7))]),
335 (1726, [(u'享保', (1736, 6, 7))]),
336 (1727, [(u'享保', (1736, 6, 7))]),
337 (1728, [(u'享保', (1736, 6, 7))]),
338 (1729, [(u'享保', (1736, 6, 7))]),
339 (1730, [(u'享保', (1736, 6, 7))]),
340 (1731, [(u'享保', (1736, 6, 7))]),
341 (1732, [(u'享保', (1736, 6, 7))]),
342 (1733, [(u'享保', (1736, 6, 7))]),
343 (1734, [(u'享保', (1736, 6, 7))]),
344 (1735, [(u'享保', (1736, 6, 7))]),
345 (1736, [(u'享保', (1736, 6, 7)), (u'元文', (1741, 4, 12))]),
346 (1737, [(u'元文', (1741, 4, 12))]),
347 (1738, [(u'元文', (1741, 4, 12))]),
348 (1739, [(u'元文', (1741, 4, 12))]),
349 (1740, [(u'元文', (1741, 4, 12))]),
350 (1741, [(u'元文', (1741, 4, 12)), (u'寛保', (1744, 4, 3))]),
351 (1742, [(u'寛保', (1744, 4, 3))]),
352 (1743, [(u'寛保', (1744, 4, 3))]),
353 (1744, [(u'寛保', (1744, 4, 3)), (u'延享', (1748, 8, 5))]),
354 (1745, [(u'延享', (1748, 8, 5))]),
355 (1746, [(u'延享', (1748, 8, 5))]),
356 (1747, [(u'延享', (1748, 8, 5))]),
357 (1748, [(u'延享', (1748, 8, 5)), (u'寛延', (1751, 12, 14))]),
358 (1749, [(u'寛延', (1751, 12, 14))]),
359 (1750, [(u'寛延', (1751, 12, 14))]),
360 (1751, [(u'寛延', (1751, 12, 14)), (u'宝暦', (1764, 6, 30))]),
361 (1752, [(u'宝暦', (1764, 6, 30))]),
362 (1753, [(u'宝暦', (1764, 6, 30))]),
363 (1754, [(u'宝暦', (1764, 6, 30))]),
364 (1755, [(u'宝暦', (1764, 6, 30))]),
365 (1756, [(u'宝暦', (1764, 6, 30))]),
366 (1757, [(u'宝暦', (1764, 6, 30))]),
367 (1758, [(u'宝暦', (1764, 6, 30))]),
368 (1759, [(u'宝暦', (1764, 6, 30))]),
369 (1760, [(u'宝暦', (1764, 6, 30))]),
370 (1761, [(u'宝暦', (1764, 6, 30))]),
371 (1762, [(u'宝暦', (1764, 6, 30))]),
372 (1763, [(u'宝暦', (1764, 6, 30))]),
373 (1764, [(u'宝暦', (1764, 6, 30)), (u'明和', (1772, 12, 10))]),
374 (1765, [(u'明和', (1772, 12, 10))]),
375 (1766, [(u'明和', (1772, 12, 10))]),
376 (1767, [(u'明和', (1772, 12, 10))]),
377 (1768, [(u'明和', (1772, 12, 10))]),
378 (1769, [(u'明和', (1772, 12, 10))]),
379 (1770, [(u'明和', (1772, 12, 10))]),
380 (1771, [(u'明和', (1772, 12, 10))]),
381 (1772, [(u'明和', (1772, 12, 10)), (u'安永', (1781, 4, 25))]),
382 (1773, [(u'安永', (1781, 4, 25))]),
383 (1774, [(u'安永', (1781, 4, 25))]),
384 (1775, [(u'安永', (1781, 4, 25))]),
385 (1776, [(u'安永', (1781, 4, 25))]),
386 (1777, [(u'安永', (1781, 4, 25))]),
387 (1778, [(u'安永', (1781, 4, 25))]),
388 (1779, [(u'安永', (1781, 4, 25))]),
389 (1780, [(u'安永', (1781, 4, 25))]),
390 (1781, [(u'安永', (1781, 4, 25)), (u'天明', (1789, 2, 19))]),
391 (1782, [(u'天明', (1789, 2, 19))]),
392 (1783, [(u'天明', (1789, 2, 19))]),
393 (1784, [(u'天明', (1789, 2, 19))]),
394 (1785, [(u'天明', (1789, 2, 19))]),
395 (1786, [(u'天明', (1789, 2, 19))]),
396 (1787, [(u'天明', (1789, 2, 19))]),
397 (1788, [(u'天明', (1789, 2, 19))]),
398 (1789, [(u'天明', (1789, 2, 19)), (u'寛政', (1801, 3, 19))]),
399 (1790, [(u'寛政', (1801, 3, 19))]),
400 (1791, [(u'寛政', (1801, 3, 19))]),
401 (1792, [(u'寛政', (1801, 3, 19))]),
402 (1793, [(u'寛政', (1801, 3, 19))]),
403 (1794, [(u'寛政', (1801, 3, 19))]),
404 (1795, [(u'寛政', (1801, 3, 19))]),
405 (1796, [(u'寛政', (1801, 3, 19))]),
406 (1797, [(u'寛政', (1801, 3, 19))]),
407 (1798, [(u'寛政', (1801, 3, 19))]),
408 (1799, [(u'寛政', (1801, 3, 19))]),
409 (1800, [(u'寛政', (1801, 3, 19))]),
410 (1801, [(u'寛政', (1801, 3, 19)), (u'享和', (1804, 3, 22))]),
411 (1802, [(u'享和', (1804, 3, 22))]),
412 (1803, [(u'享和', (1804, 3, 22))]),
413 (1804, [(u'享和', (1804, 3, 22)), (u'文化', (1818, 5, 26))]),
414 (1805, [(u'文化', (1818, 5, 26))]),
415 (1806, [(u'文化', (1818, 5, 26))]),
416 (1807, [(u'文化', (1818, 5, 26))]),
417 (1808, [(u'文化', (1818, 5, 26))]),
418 (1809, [(u'文化', (1818, 5, 26))]),
419 (1810, [(u'文化', (1818, 5, 26))]),
420 (1811, [(u'文化', (1818, 5, 26))]),
421 (1812, [(u'文化', (1818, 5, 26))]),
422 (1813, [(u'文化', (1818, 5, 26))]),
423 (1814, [(u'文化', (1818, 5, 26))]),
424 (1815, [(u'文化', (1818, 5, 26))]),
425 (1816, [(u'文化', (1818, 5, 26))]),
426 (1817, [(u'文化', (1818, 5, 26))]),
427 (1818, [(u'文化', (1818, 5, 26)), (u'文政', (1831, 1, 23))]),
428 (1819, [(u'文政', (1831, 1, 23))]),
429 (1820, [(u'文政', (1831, 1, 23))]),
430 (1821, [(u'文政', (1831, 1, 23))]),
431 (1822, [(u'文政', (1831, 1, 23))]),
432 (1823, [(u'文政', (1831, 1, 23))]),
433 (1824, [(u'文政', (1831, 1, 23))]),
434 (1825, [(u'文政', (1831, 1, 23))]),
435 (1826, [(u'文政', (1831, 1, 23))]),
436 (1827, [(u'文政', (1831, 1, 23))]),
437 (1828, [(u'文政', (1831, 1, 23))]),
438 (1829, [(u'文政', (1831, 1, 23))]),
439 (1830, [(u'文政', (1831, 1, 23))]),
440 (1831, [(u'文政', (1831, 1, 23)), (u'天保', (1845, 1, 9))]),
441 (1832, [(u'天保', (1845, 1, 9))]),
442 (1833, [(u'天保', (1845, 1, 9))]),
443 (1834, [(u'天保', (1845, 1, 9))]),
444 (1835, [(u'天保', (1845, 1, 9))]),
445 (1836, [(u'天保', (1845, 1, 9))]),
446 (1837, [(u'天保', (1845, 1, 9))]),
447 (1838, [(u'天保', (1845, 1, 9))]),
448 (1839, [(u'天保', (1845, 1, 9))]),
449 (1840, [(u'天保', (1845, 1, 9))]),
450 (1841, [(u'天保', (1845, 1, 9))]),
451 (1842, [(u'天保', (1845, 1, 9))]),
452 (1843, [(u'天保', (1845, 1, 9))]),
453 (1844, [(u'天保', (1845, 1, 9))]),
454 (1845, [(u'天保', (1845, 1, 9)), (u'弘化', (1848, 4, 1))]),
455 (1846, [(u'弘化', (1848, 4, 1))]),
456 (1847, [(u'弘化', (1848, 4, 1))]),
457 (1848, [(u'弘化', (1848, 4, 1)), (u'嘉永', (1855, 1, 15))]),
458 (1849, [(u'嘉永', (1855, 1, 15))]),
459 (1850, [(u'嘉永', (1855, 1, 15))]),
460 (1851, [(u'嘉永', (1855, 1, 15))]),
461 (1852, [(u'嘉永', (1855, 1, 15))]),
462 (1853, [(u'嘉永', (1855, 1, 15))]),
463 (1854, [(u'嘉永', (1855, 1, 15))]),
464 (1855, [(u'嘉永', (1855, 1, 15)), (u'安政', (1860, 4, 8))]),
465 (1856, [(u'安政', (1860, 4, 8))]),
466 (1857, [(u'安政', (1860, 4, 8))]),
467 (1858, [(u'安政', (1860, 4, 8))]),
468 (1859, [(u'安政', (1860, 4, 8))]),
469 (1860, [(u'安政', (1860, 4, 8)), (u'万延', (1861, 3, 29))]),
470 (1861, [(u'万延', (1861, 3, 29)), (u'文久', (1864, 3, 27))]),
471 (1862, [(u'文久', (1864, 3, 27))]),
472 (1863, [(u'文久', (1864, 3, 27))]),
473 (1864, [(u'文久', (1864, 3, 27)), (u'元治', (1865, 5, 1))]),
474 (1865, [(u'元治', (1865, 5, 1)), (u'慶応', (1868, 10, 23))]),
475 (1866, [(u'慶応', (1868, 10, 23))]),
476 (1867, [(u'慶応', (1868, 10, 23))]),
477 ]
4月3日追記:「(4月3日改)」とある通り、抜けがあったので修正。なんでだろ、元和～元禄がごっそり抜けてた。
最初は「大化」から「平成」までやろうかと思ったけど、南北朝時代に元号がブランチしちゃうので南北朝合一後から。一世一元以降は、「期間（公的）」「期間（当時）」の意味がわからなかったのと、まぁ後でいいかと思ったのと。
これをビジュアライズしたいんだよねぇ。何使おうかな?
なお、この形式のリストの前に、こんなリストを先に作ってます：
gengo_list.py (4月3日改)
1 # -*- coding: utf-8 -*-
2 GENGO_LIST = (
3 (u"応永", (1394, 8, 2), (1428, 6, 10)),
4 (u"正長", (1428, 6, 10), (1429, 10, 3)),
5 (u"永享", (1429, 10, 3), (1441, 3, 10)),
6 (u"嘉吉", (1441, 3, 10), (1444, 2, 23)),
7 (u"文安", (1444, 2, 23), (1449, 8, 16)),
8 (u"宝徳", (1449, 8, 16), (1452, 8, 10)),
9 (u"享徳", (1452, 8, 10), (1455, 9, 6)),
10 (u"康正", (1455, 9, 6), (1457, 10, 16)),
11 (u"長禄", (1457, 10, 16), (1461, 2, 1)),
12 (u"寛正", (1461, 2, 1), (1466, 3, 14)),
13 (u"文正", (1466, 3, 14), (1467, 4, 9)),
14 (u"応仁", (1467, 4, 9), (1469, 6, 8)),
15 (u"文明", (1469, 6, 8), (1487, 8, 9)),
16 (u"長享", (1487, 8, 9), (1489, 9, 16)),
17 (u"延徳", (1489, 9, 16), (1492, 8, 12)),
18 (u"明応", (1492, 8, 12), (1501, 3, 18)),
19 (u"文亀", (1501, 3, 18), (1504, 3, 16)),
20 (u"永正", (1504, 3, 16), (1521, 9, 23)),
21 (u"大永", (1521, 9, 23), (1528, 9, 3)),
22 (u"享禄", (1528, 9, 3), (1532, 8, 29)),
23 (u"天文", (1532, 8, 29), (1555, 11, 7)),
24 (u"弘治", (1555, 11, 7), (1558, 3, 18)),
25 (u"永禄", (1558, 3, 18), (1570, 5, 27)),
26 (u"元亀", (1570, 5, 27), (1573, 8, 25)),
27 (u"天正", (1573, 8, 25), (1593, 1, 10)),
28 (u"文禄", (1593, 1, 10), (1596, 12, 16)),
29 (u"慶長", (1596, 12, 16), (1615, 9, 5)),
30 (u"元和", (1615, 9, 5), (1624, 4, 17)),
31 (u"寛永", (1624, 4, 17), (1645, 1, 13)),
32 (u"正保", (1645, 1, 13), (1648, 4, 7)),
33 (u"慶安", (1648, 4, 7), (1652, 10, 20)),
34 (u"承応", (1652, 10, 20), (1655, 5, 18)),
35 (u"明暦", (1655, 5, 18), (1658, 8, 21)),
36 (u"万治", (1658, 8, 21), (1661, 5, 23)),
37 (u"寛文", (1661, 5, 23), (1673, 10, 30)),
38 (u"延宝", (1673, 10, 30), (1681, 11, 9)),
39 (u"天和", (1681, 11, 9), (1684, 4, 5)),
40 (u"貞享", (1684, 4, 5), (1688, 10, 23)),
41 (u"元禄", (1688, 10, 23), (1704, 4, 16)),
42 (u"宝永", (1704, 4, 16), (1711, 6, 11)),
43 (u"正徳", (1711, 6, 11), (1716, 8, 9)),
44 (u"享保", (1716, 8, 9), (1736, 6, 7)),
45 (u"元文", (1736, 6, 7), (1741, 4, 12)),
46 (u"寛保", (1741, 4, 12), (1744, 4, 3)),
47 (u"延享", (1744, 4, 3), (1748, 8, 5)),
48 (u"寛延", (1748, 8, 5), (1751, 12, 14)),
49 (u"宝暦", (1751, 12, 14), (1764, 6, 30)),
50 (u"明和", (1764, 6, 30), (1772, 12, 10)),
51 (u"安永", (1772, 12, 10), (1781, 4, 25)),
52 (u"天明", (1781, 4, 25), (1789, 2, 19)),
53 (u"寛政", (1789, 2, 19), (1801, 3, 19)),
54 (u"享和", (1801, 3, 19), (1804, 3, 22)),
55 (u"文化", (1804, 3, 22), (1818, 5, 26)),
56 (u"文政", (1818, 5, 26), (1831, 1, 23)),
57 (u"天保", (1831, 1, 23), (1845, 1, 9)),
58 (u"弘化", (1845, 1, 9), (1848, 4, 1)),
59 (u"嘉永", (1848, 4, 1), (1855, 1, 15)),
60 (u"安政", (1855, 1, 15), (1860, 4, 8)),
61 (u"万延", (1860, 4, 8), (1861, 3, 29)),
62 (u"文久", (1861, 3, 29), (1864, 3, 27)),
63 (u"元治", (1864, 3, 27), (1865, 5, 1)),
64 (u"慶応", (1865, 5, 1), (1868, 10, 23)),
65 )
4月3日追記:「(4月3日改)」とある通り、抜けがあったので修正。なんでだろ、元和～元禄がごっそり抜けてた。
gengo_list.py から gengo_rellist.py へは、以下の馬鹿スクリプトで：
1 # -*- coding: utf-8 -*-
2 import re
3 import sys, codecs
4 sys.stdout = codecs.getwriter('utf-8')(sys.stdout)
5 from gengo_list import GENGO_LIST
6
7 print("# -*- coding: utf-8 -*-")
8 print("GENGO_RELLIST = [")
9 idx = 0
10 cur = (GENGO_LIST[0][0], GENGO_LIST[0][2])
11 for y in range(GENGO_LIST[0][1][0], GENGO_LIST[-1][2][0]):
12 if y == GENGO_LIST[0][1][0]:
13 inner = [(u"", GENGO_LIST[0][1]), cur]
14 else:
15 inner = [cur]
16 while GENGO_LIST[idx][2][0] <= y:
17 idx += 1
18 cur = (GENGO_LIST[idx][0], GENGO_LIST[idx][2])
19 inner.append((GENGO_LIST[idx][0], GENGO_LIST[idx][2]))
20 print(u" %s," %
21 re.sub(r"\\u([a-f0-9]{4})",
22 lambda m: unichr(int(m.group(1), 16)),
23 repr((y, inner))))
24 print("]")
gengo_rellist.py 自体がまぁ「手作業保守可能」にはなってるんで、このスクリプトは、多分用済みかなと。
しょーもないネタですんません。
