Wakamono Tachi bears a strong resemblance to Under One Roof to an astounding degree. There might be more siblings in Under One Roof, but those in Wakamono Tachi share the same issues as many of them (albeit mixed around). The eldest brother in each is a hard-working, lovable goofball who talks loud and fast. There's a lot of bickering at the table, a young sister having an affair with an older man at work, etc. But aside from these and other similarities, both are warm family dramas with a lot of heart and a good message. Plus, they each have "the cast of the decade," so to speak.
Both shows are centered around a family of siblings living together and the struggles they face in their daily lives. Only difference is that in "The Bond" the siblings still have a father(if you can even call him that) alive while "Under One Roof" the oldest sibling is the father figure to his younger siblings.