Nanyo Boeki Company Ltd was a Japanese distributor of microphones, amplifiers and musical instruments.  In the mid 1980s Nanyo aquired the Sexton Guitar Company and manufactured SGC Nanyo basses and launched the Guitar Collection and Bass Collection brands. Nanyo Boeki went out of business (at least the musical instrument part) in the early 2000s and the Bass Collection brand name was aquired by the Bass Centre in London, UK - who were the exclusive UK distributors of Bass Collection basses in the late 1980s and 1990s.

Source: Bass Collection website (16 July 2018)