There's a few good chained authentic Japanese restaurants in Thailand. Torajiro is one of them. They specialize in yakitori (chargrilled chicken) or all things chargrilled.
Chargrilled Onigiri (rice ball) stuffed with cooked salmon.
This gets a bit much. It's pretty heavy.
Rice with squid and Natto (fermented beans)
I hate the fermented beans.
Ikura with salmon over rice. This was extremely fattening and delicious.