noun
Saijō Kōsan (consortium)
Company name; refers to a specific business entity.
最上恒産は、かつて存在した日本の企業連合である。
Saijō Kōsan was a Japanese business consortium that once existed.
The name is composed of the kanji 最上 (highest, supreme) and 恒産 (constant property or enterprise), but the exact historical derivation of the company name is uncertain.