Search gender: all male female Sadayoshi Boy Name Meaning, Kanji Variations. 41 names found. gender: all male female Name: sadayoshi Katakana: サダヨシ 0 Kanji: 定剛 Meaning: 定Decide. Calm down. To stabilize. To calm down. To settle down to a certain level and not move. Surely. Always. Clearly. 剛Strong, hard, durable. Strong in temperament and will. Just. Just now. Exactly. To cut off. You can save your favorite names with prev123 NazukePON > About Japanese Names > Search For Japanese Names > Sadayoshi Boy Name Meaning, Kanji Variations.