Averaged 14.9% viewership during its original run in Japan.
Its manga was the most popular manga during most of its original run(1992-2000) in Japan and Korea, leading Weekly Shonen Magazine to become the best selling manga magazine in Japan in the early 90s.
Currently Weekly Shonen Magazine's best-selling and most popular manga series, with over 95million copies.
Kindaichi's grandfather is actually a famous pre-existing fictional character in Japan who appears in a series of cases written by author Seishi Yokomizo.