Keita Imamura dropped a team-high 15 points and Ryuichi Kishimoto added 14 as defending champions the Ryukyu Golden Kings outgunned the Hiroshima Dragonflies 74-62 in Game 1 of the B-League finals on Saturday. Contesting their third straight Japanese basketball championship series, the Okinawa-based Golden Kings led wire to wire but had to withstand a late fightback by the first-time finalist Dragonflies at Yokohama Arena. Head coach Dai Oketani’s men led 24-16 at the end of the first period and broke the game open with a 19-9 second quarter. They outshot Hiroshima 15-8 from three-point range,…