House of Ninjas - A family of Ninjas
Lupin no Musume - A family of Thieves

There are many similarities between this 2 dramas, you wont regret it !

One sets in 1960s in Hk Kowloon Walled City, the other sets in 1960s in Thailand Chinatown. The story and most of the cast are pretty much the same. Not a sequel but more like a spin off.