City Hunter
シティーハンター (original)
Ryo Saeba works the streets of Tokyo as the City Hunter. He's a "sweeper" and with his sidekick Kaori Makimura, he keeps the city clean. People hire the City Hunter to solve their dangerous problems, which he does with a Colt Python. When Ryo's not working on a case, he's working on getting the ladies, and Kaori must keep him in check with her trusty 10 kg hammer.
Starring Akira Kamiya, Kazue Ikura, Tesshou Genda, Mami Koyama, Yoko Asagami
Watch "City Hunter" on Tubi TV released in 1987. It's a action & adventure and animation show, and has a rating of 7.7 out of 10 from Imdb which is usually fine for this kind of show, and is currently available to watch for free.