[1] He joined the Yashiro High School's baseball team as a pitcher, but doubled as an outfielder with the aim to develop a more holistic physique.

[4][5] He entered as a pitcher again in Kwansei Gakuin University, but due to injuries in his shoulders and elbow, he switched to an outfielder position in his 3rd year.

[7] In his second year playing in the Intercity Baseball Tournament, he helped his team win the championships, and received the Hashido Award as the league's most valuable player with a batting average of 0.524.

[9] Chikamoto was chosen as the Hanshin Tigers' 3rd alternative pick during the 1st round of the 2018 Nippon Professional Baseball draft (after they lost the lottery draw for Kyota Fujiwara and Ryosuke Tatsumi).

[15] From then on, he continued to secure the lead-off spot and went on a hitting spree for 13 consecutive games which broke the team rookie record.

He went on a slump during the June inter-league games, but his previous performances were enough to earn him a spot in the outfield during the mid-season All-Star Series.

He did not disappoint when went 5-for-5 on the July 13 series finale, and became the second player and only rookie in NPB history to hit for the cycle in an All-Star game.

Despite seeing less playing time due to a COVID-19 pandemic-shortened season, he appeared in all of the team's 120 games and hit a higher average of .293 with 45 RBI including 9 home runs.

[32] Despite his average stature of 1.7 metres (5 ft 7 in), his 50 yard dash was timed at 5.8 seconds, and his throws cover a distance of 100 meters.