Seiko Okamoto defeated Junri Namigata 6-3 0-6 6-4 in the Nagano 25K quarter-final on carpet. The upset overturned the form book — Junri Namigata came in leading the head-to-head 1–0. Seiko Okamoto claimed a first win over Junri Namigata in two meetings, levelling the head-to-head at 1–1.
Okamoto S. came through in three sets.
Seiko Okamoto beat Junri Namigata 6-3 0-6 6-4. Umpiry, "Seiko Okamoto vs Junri Namigata — Nagano 25K Quarter-final", https://umpiry.com/match/2005-05-23/namigata-vs-okamoto-nagano-25k-qf?utm_source=cite (as of 23 May 2005).