Could a vegetarian travel to japan???

I mean , without eating meat or missing cultural food ????

You're going to miss out on some Japanese cuisine, but not everything has meat in it. A strict vegetarian or vegan would have a harder time, as fish is a base ingredient for a lot of things. Do a search, other people have asked this before.

I'm going to have to search as well. I'm a vegetarian and I really don't deviate past eggs. I realize this cuts a good 80% of the diet down, (in America, at least) but I was hoping that in Japan there'd be a much wider gap.

Here is what I found:
vegetarian @ japan
https://jref.com/dir/Gastronomy/

I'm 99% not going to eat at Subway or Quiznos every day, I'm pretty sure vegetables and some short lessons with my mom in cooking will suffice. Gorge on fast foods once a week maybe.

I've had my fair share of veggie food in my travels to Japan, including some good old traditional treats:

various sobas
tempura
vegetable sushi
all the rice you can eat
veggie yakisoba
udon can be a little tough with no meat or fish broth
curry rice
pickled vegetables
yummy Japanese strawberries and Asian pears!
THE BAKERIES

Is it true there's a lot of salt in those foods?

tigermilk said:

I've had my fair share of veggie food in my travels to Japan, including some good old traditional treats:

various sobas
tempura
vegetable sushi
all the rice you can eat
veggie yakisoba
udon can be a little tough with no meat or fish broth
curry rice
pickled vegetables
yummy Japanese strawberries and Asian pears!
THE BAKERIES

Click to expand...

Sorry tigermilk, I do not mean to negate your experience in Japan, but some of the food you listed is not common or not easily available...

Normally tempura includes seafood, and "vegetable sushi" is not common - if you go to sushi restaurants in Japan and if you want sushi without seafood, then what I can think of is kappa maki (sushi roll with cucumber) or kanpyo maki (another roll with stewed kanpyo which is thin strips of dried gourd).
I've never heard of vegetable yakisoba, usually they put some pork.
You'll find meat in most curry rice (sometimes they serve "vegetable curry" though), and if udon is off because of fish based broth, then same goes with soba.

If you can eat seafood, it is much easier.

Also, if you're vegetarian and like tofu, and want to experience traditional Japanese food, I'd recommend to visit restaurants specialized tofu dishes. They serve tofu and yuba in many different ways.
http://www.umenohana.co.jp/e/index.html

TGI Friday's in Roppongi has a vegetarian menu, as I recall.