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Segment Information (Geographical Revenues and Income before Income Taxes) (Detail) - JPY (¥)
¥ in Millions

12 Months Ended

Mar. 31, 2023

Mar. 31, 2022

Mar. 31, 2021

Segment Reporting Information [Line Items]

Total Revenues

¥ 2,666,373

¥ 2,520,365

¥ 2,292,708

Income before Income Taxes

367,168

504,876

287,561

Japan | Reportable Geographical Components

Segment Reporting Information [Line Items]

Total Revenues

2,006,349

1,946,153

1,817,124

Income before Income Taxes

195,254

322,755

177,157

The Americas | Reportable Geographical Components

Segment Reporting Information [Line Items]

Total Revenues

^[1]

261,948

240,234

208,072

Income before Income Taxes

^[1]

73,179

94,759

57,304

Other Countries | Reportable Geographical Components

Segment Reporting Information [Line Items]

Total Revenues

^[2]

398,076

333,978

267,512

Income before Income Taxes

^[2]

¥ 98,735

¥ 87,362

¥ 53,100

[1]	Mainly the United States
[2]	Mainly Asia, Europe, Australasia and Middle East

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