[Nyororin]

I have found that the big name delivery pizza places in Japan are pretty pathetic. Aoki`s and Pizza-La have never been anything above mediocre, so I never order from them.
Domino's Japan is iffy. Pizza Hut is kind of close to their US counterpart.

Smaller delivery places tend to be much better. Our local delivery place is pretty good, although there is no shortage of strange toppings. (Corn, mochi, octopus, burdock, etc...) We just don`t order them.

If you want *Italian* pizza though - Japan is GREAT. There are countless small restaurants with stone ovens making the greatest pizzas.

It is my understanding that the standard toppings like corn came about because when pizzas first started being sold on US military bases in the 60s, the regular toppings being sold in the US were too expensive to import and keep fresh... So the type of cheese was changed and inexpensive vegetable toppings that kept well (ie. in a can) were used. This ended up making corn a staple. Pizza places started off base used the same topping lineup (As that was "pizza" in their experience). As pizzas have always had corn on them here, to the average person in Japan that IS the standard pizza.