The traditional Taiyaki.
Its inside is bean paste.
The new kind of "white Taiyaki".
This one contains some custard. In Japan Taiyaki is now more popular than ever before. It is a Japanese snack, and its outer dough is made from flour, egg, milk and the inside stuff is bean paste. Taiyaki was first invented in the early 20th century, but it has become very popular recently.
Some shops sell "white Taiyaki" whose dough is white, elastic and made from tapioca. And the inside taste of this white snack varies from bean paste to custard, chocolate, and even green tea.
In the episode 10 of anime "Ai Yori Aoshi"(part 1, part 2, part 3), Aoi buys the traditional Taiyaki and delivers it to Kaoru.
