| 器具備品(純額) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 器具備品(純額)、有形固定資産、投資運用業 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 器具備品 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ivt/role/label | http://www.xbrl.org/2003/role/link |
| Equipment, net | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Equipment, net-PPE-IVT | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Equipment, net | en | http://disclosure.edinet-fsa.go.jp/jppfs/ivt/role/label | http://www.xbrl.org/2003/role/link |