noun
soba noodles served continuously in small bowls
A style of serving soba, associated with Iwate Prefecture, where a server keeps refilling the customer's bowl with small portions until the customer indicates they are full.
岩手県に行ったら、わんこそばを食べてみたい。
When I go to Iwate Prefecture, I want to try wanko soba.
Wanko soba is a style where you keep getting refills of small bowls of soba one after another.