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.
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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.