Kindaichi Shonen no Jikenbo: Shanghai Ningyo Densetsu

Kindaichi is off on yet another case, this time in Shanghai. When the father of a Chinese friend of the young Kindaichi is murdered at the circus, it is up to the ever-resourceful and clever young high-school detective to solve the case. But hidden in the background is the 4000-year-old legend of the Shanghai Mermaid.
(Source: NTV)
~~ Adapted from the manga series "The Kindaichi Case Files" (金田一少年の事件簿) written by Kanari Yozaburo (金成陽三郎) and Amagi Seimaru (天樹征丸) and illustrated by Sato Fumiya (さとうふみや).