v3.25.2
Sales Revenues - Summary Of Sales Revenues From External Customers By Business And By Product Category (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Sales of products ¥ 43,598,877 ¥ 41,648,130 ¥ 34,367,619
Financial services 4,437,827 3,447,195 2,786,679
Total sales revenues 48,036,704 45,095,325 37,154,298
Vehicles, Automotive [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Sales of products 36,892,232 35,249,865 28,394,256
Parts and components for production, Automotive [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Sales of products 1,606,173 1,596,111 1,710,422
Parts and components for after service, Automotive [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Sales of products 3,423,389 3,166,586 2,866,196
Other, Automotive [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Sales of products 1,074,505 1,068,169 805,995
Total automotive [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Sales of products 42,996,299 41,080,731 33,776,870
All other [Member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Sales of products ¥ 602,578 ¥ 567,399 ¥ 590,749