Asian/Japan Open?? Not sure but then Blackpool
This is WDC competitions. IDSF competitons don't have as regular schedule so for them I would suggest to look at the IDSF web-site.
UK Open is in January.
French Open is is April.
European is normally in the Spring sometime.
Blackpool is in May.
Japan open is in June.
German Open is in August.
US Open is in September.
International Championship is in October.
World Championship is normally in November.
Ohio Star Ball is in November.