@PTERCOfficial *2 number of 7A coach: Nippon Sharyo
*10 number of 7B coach: Kinki Sharyo
*4 number of 7BM coach: Hitachi
*6 number of 7C coach: Hitachi
*20 number of 7C coach: Nippon Sharyo
*22 number of 7C coach: Pullman
Niigata Engineering was entered to built MRR coaches since 1955.
@PTERCOfficial Hello sir, about 1949's Japanese coaches, I found new detail from JARi's books. 2 of 7A series built by Nippon Sharyo, 10 of 7B series built by Kinki Sharyo, 4 of 7BM series built by Hitachi, 26 of 7C series built by Nippon Sharyo and Hitachi.
*JARi's books:『鉄道車両資料月報』