Rice dishes are great.
I went back to Nyan Nyan in Kita-Urawa for another super-rustic lunch. I had Mabo-don (mabo dofu with rice). So simple and rustic.
In Ginza, I had Zuke Honmaguro Don (soy-marinated blue fin tuna over rice) at Tarafuku Manma. I loved the toppings of the grated yama-imo (mountain yam) with raw quail egg.