Supplemental Cash Flow Information - Schedule of Significant Non-cash Transactions (Details) - JPY (¥) ¥ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Supplemental Cash Flow Informations [Abstract]
Increase in right-of-use assets	¥ 504	¥ 8,862	¥ 1,852

The increase (decrease) in right-of-use assets. [Refer: Right-of-use assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 16
-IssueDate 2025-01-01
-Paragraph 73
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2025-en-r&anchor=para_73_e&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_IncreaseDecreaseInRightofuseAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration