Head-to-Head

Overview

Natsumi Kawaguchi and Sayaka Ishii have met 2 times so far, all in 2026. The rivalry is level at 1–1. On hard, they're tied 1–1. Their first encounter was at the 2026 W100 Takasaki (R32), won by Natsumi Kawaguchi. Most recently they met at the 2026 W50 Nanao, with Sayaka Ishii winning.