Not japanese market, just not made for very long or in high numbers and a little bit rare. The model started as the 620 and was made from 78 to 84 with a nylon lining. It was then renamed 621 and made in 85 with a poplin lining for a single year. It was made again in 87 for a single year with a poly lining. Last year of production was 94 when it was made with a fur collar, which leads me to believe this is a 94 version. So really this jacket was only produced during 9 years, in 4 production runs, which is pretty small for a company like Schott.