| 税引前当期純利益又は税引前当期純損失(△) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 税引前当期純利益又は税引前当期純損失(△) | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 税引前当期純利益 | ja | http://www.xbrl.org/2003/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 税引前当期純損失(△) | ja | http://www.xbrl.org/2003/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 税金等調整前当期純利益又は税金等調整前当期純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/label | http://www.xbrl.org/2003/role/link |
| 税金等調整前中間純利益又は税金等調整前中間純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| 税金等調整前四半期純利益又は税金等調整前四半期純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| 税引前中間純利益又は税引前中間純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| 税引前四半期純利益又は税引前四半期純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| 税引前当年度純利益又は税引前当年度純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/label | http://www.xbrl.org/2003/role/link |
| 税金等調整前中間純利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 税引前中間純利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 税金等調整前四半期純利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 税引前四半期純利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 税金等調整前当期純利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 税金等調整前当期純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 税金等調整前中間純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 税引前中間純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 税金等調整前四半期純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 税引前四半期純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 税引前当年度純損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 税引前当年度純利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Profit before income taxes | en | http://www.xbrl.org/2003/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Loss before income taxes | en | http://www.xbrl.org/2003/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/label | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| Profit (loss) before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/label | http://www.xbrl.org/2003/role/link |
| Profit before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Profit before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Profit before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Profit before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Profit before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Loss before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Loss before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Loss before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Loss before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Loss before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Loss before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Profit before income taxes | en | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/positiveLabel | http://www.xbrl.org/2003/role/link |