Too Small?
 

I recently bought these briefs from GX3 in Japan.
https://imgur.com/a/puZOzag
Knowing that Japanese sizes run small, I looked at their size chart and went up one size. Do you think I should have gone up two?

No, your suit fits perfectly, you are in great shape! I like to wear AQUX and Mategear suits, I wish I looked as good.

it does fit perfectly. I buy Neptune Scepter suits in the small size and they are tight and hug the body nicely. That suit presents your bulge in a nice conservative way too. Enjoy it!!

I think it looks great on you! both fit and coverage look fine imho

Looks great!
 

I think your suit looks great! I agree with the others on its fit and appearance. Let us know how things go when you have a chance to enjoy it at the beach or pool!

These swim briefs fit you perfectly, you should be pleased with how they look.
You will notice on the rear they have a mesh seam designed to let the water out as you swim. These briefs are intended to be worn low, so low that the top of your ass crack will show and scoop up water that then escapes through the rear mesh seam.
Don't keep trying to pull these briefs up to your navel every 5 minutes, they do what they're meant to do and will keep riding low.

Rockin' that bikini!
 

You've got the right toned-up abs and up-high navel for this suit. Their full exposure is helping you project a sense of confident eroticism. 😊 (Along with just the right "presentation" of the "package"!) You'll feel right at home among like-minded (and so-clad!) guys and gals!

No, this suit looks like it fits you perfectly, though I am curious how the next size smaller would look on you. I say that because I think these suits have quite a bit of stretch to them and a little smaller all the way around could be just the right kind of hot for the more sexy situations.

This suit, in this size, on you, looks perfectly fine for even the most conservative situations. In your shoes, I'd be willing to wear this anywhere for anything.

These suits "break in" and fit better after you wear them a few times, they won't feel as tight. Enjoy!

These particular ones don't have mesh in the seam. I have had ones with mesh previously and don't find them as comfortable - the mesh seam feels a bit thick and stiffer - OK when actually swimming, but not for sitting beside the pool.