Share-based Payment - Additional Information (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Restricted stock unit Vesting Period In Share Based Payment Arrangement	30 years
Restricted shares recognized as expenses	¥ 3,387	¥ 2,598
Weighted average stock price at the date of exercise	¥ 4,148	¥ 3,160

The weighted average share price at the date of exercise for share options that are exercised in a share-based payment arrangement. [Refer: Types of share-based payment arrangements [domain]; Weighted average [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45_c&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_WeightedAverageExercisePriceOfShareOptionsInSharebasedPaymentArrangementExercisedDuringPeriodAtDateOfExercise2019
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	duration