This is hopper for coal, model Hoki10000. In Japan, standard color of freight car is black except container and private car (=owner is not JR Freight) has company trade mark and logo.
This Hoki10000 was manufactured before 1994 (attached photo is in 2002), sponsored by Chichibu cement corporation, so trade mark and logo is Chichibu cement. Such as PANAM and UNITED, trade mark and logo of all cars were not changed immediately.
Taiheiyo cement
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official site:
http://www.taiheiyo-cement.co.jp/english/index.html
1881 Onoda cement established.
1883 Asano cement established.
1923 Chichibu cement established.
1947 Asano cement renamed to Nihon cement.
1994 ChichibuOnoda cement established. (Onoda merged in Chichibu)
1998 Taiheiyo cement established. (ChichibuOnoda merged in Nihon)