"Ono-Sendai: in the book this is a Japanese corporation that manufactures cyberdecks. In Japanese “Ono” means ax and “Sendai” is the name of a prefecture in Japan."

Ono (斧) is indeed ax in Japanese, but is also a common surname. (The name is written differently, as 小野, no relation to axes.) Being a company name, it sounds more natural to interpret it as a surname rather than a weapon.