Gentlemen
We can debate this issue till the cows come home. It will not change a thing.
If you have doubts, contact the contracting companies and they will give you their answer. THIEIR answer is the definitive answer.
The requirements for conversion to a JAPANESE ATPL are rigid and cannot be negotiated. If you meet the requirements, then your application should be able to be processed. If you don't meet the requirements, then find out, from the contracting company, what is required and move forward from there.
This endless discussion of PICUS etc. on pprune is pointless, as the JCAB will not be influenced by pprune.