| 損益及び剰余金計算書 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 損益及び剰余金計算書 [表] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 中間損益及び剰余金計算書 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| Statement of income and retained earnings | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Statement of income and retained earnings [table] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Semi-annual statements of income and retained earnings | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |