Should japan join the transpacific partnership with US?

Question:

why.why not?

Answer:

This question itself does not make a sense.
TPP, advocated by the US, is meant to be a transpacific, multi-national, duty-free trade and commerce agreement. This is not a bilateral accord in which Japan will (or will not) join together with the US.

To make a long story short, Japan should not join the TPP.

The US and some Asia-Pacific nations may benefit from this framework; however, it may not be the case of Japan and some other Asian countries. Since the national interests of every country vary greatly, bilateral Free Trade Agreements (FTA) among the Asia-Pacific nations seem to make much more sense. In fact, Japan has been talking about FTA with ASEAN (Association of South‐East Asian Nations).