Ken Luis Ishihara Tsukazan
- Bats Right, Throws Right
- Height 5' 8", Weight 154 lb.
Ken Ishihara was on the Peruvian national team that won the Bronze in the 2012 South American Championship. He pitched for Peru in the 2013 Bolivarian Games. He was with Peru for the 2015 South American Championship, winning the Bronze Medal. He allowed 7 hits and 5 runs (2 earned) in 3 innings, striking out two. He led Peru's staff in the 2016 South American Championship, allowing three unearned runs in 7 innings (6 H, 1 BB, 5 K) before Kevin Yamamoto relieved in a 5-4 win over Chile to give Peru a spot in the semifinals.
He is the brother of Jin Ishihara.