| Art 19 para 2 item 4 | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Change to major shareholders | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Change to major shareholders (holding 10 percent or more voting rights) [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 第19条第2項第4号 | ja | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| 主要株主の異動 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 主要株主の異動 [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |