[dirtyroboto]

When I tx'd my clean UK license to JP there was no test apart from the eye test. I understand that if you have endorcements then your situation may be different, depending on the amount of points or if you have had a license revoked and re-issued.
I did not do a written nor aptitude test and the transfer was ok except for my not having my old passport (valid at the time I passed my UK test) and having to get an AD from the embassy at vampire rates.

I hope you have the UK motorcycle license, as that one you will have to take seperatly to get it added to the JP if you did not do the UK test.