Stownet fishing season in Bisan Seto 2026－The expected navigable water area in the traffic lane during the peak season The Stownet fishing season starts from 1 February 2026 throughout Bisan Seto, Japan. We have obtained a table on the expected navigable water area in the traffic lane during the peak season from Licensed Inlandsea Pilots’ Association. We attach a free translation of the table for your reference.