I am not working on these, but I haven't abandoned them, I am just very busy these days. I actually have quite a few units done, I just havent found the motivation to do the work to make them into FLCs
The next back does have a JGSDF unit, but he is actually a variation of the old one. Because after reading I thought his gun is a bit out-dated.
Japan does not have a real marine corps, I think this is probably due to the idea that attacking from sea and landing on land is usually done in an offensive maneuver. But the JMSDF does have several landing craft both for men and tanks. I don't know who they are meant to carry, I assume the JMSDF would carry the JGSDF infantry from the sea and the JGSDF would make the amphibious assault. The JGSDF does have some sort of marine-type units, the Western Army Infantry Regiment and the JGSDF Rangers, I think that these would be thought of more as Special Forces though.
But with recent events, I wouldn't be surprised if Japan begins to train more specifically marine-type units.