Handbooks/manuals can be found for SOME models but it's not always an easy search. Oz and NZ are usually good places to look.
I don't think the fact that Japanese is the language used should be so surprising..after all, you are buying a JDM model (Domestic Market)...and not meant for "other" markets outside Japan.
It is a small price to pay for having a well spec'd model with all the bells and whistles you could want..and all at a very reasonable price..and usually in excellent condition too...particularly underneath !!
As you have found out, you can usually translate diagrams/pics etc ...and after over 2 years of ownership there is little I don't know about my Estima.
My original handbook that came with the car is in Japanese and it's useful up to a point...very often common sense and logic can fill in the gaps. (assuming you know at least a little about motor vehicles.)
I have never felt the need for a translated handbook.
Hi,
WD40 will work, but have found things like Plus Gas Dismantling Fluid work even better.
Also patience, for such seized items , clean away any muck around the area and give a good spray but then repeat spray every few hours and leave overnight to really let it work in.