|Relatives||Saki Arima (wife; deceased)|
Kousei Arima (son)
|Japanese Voice||Kenji Hamada|
|Anime Debut||Episode 23: Moments|
Takahiko closely resembles an older version of his son, Kousei Arima with short messy black hair, blue eyes and he wears thick black-rimmed spectacles.
Hiroko Seto described him as a "free-range parent" due to him always being away on business trips.
Your Lie In April
Takahiko regularly goes on business trips, leaving his son, Kousei Arima home alone for most of the year.
- The name Takahiko means "filial piety, obedience" (孝) (taka) and "boy, prince" (彦) (hiko).
- Takahiko's surname Arima means "exist" (有) (ari) and "horse" (馬) (ma), which literally means "Possesses a horse" altogether.