Yamada Taro Monogatari (2007)

They both involve large families, and the oldest child having to support them because of their low-income/no-income/lousy parents.

Though the stories are totally different, however, they're both very enjoyable.

Live action from manga. Fantasy & excessive imaginary? Give it to the girl^_^This comedy friendship family & a little sweet romance is a must watch(^o^)You will appreciate every thing. All 3 actor is a big name now

Actors Sho Sakurai and Mikako Tabe first acted together in Yamada Taro Monogatari. It's nice to see them reunited after 10 years.

Actor Ninomiya Kazunari and Actress Mikako Tabe acted together in both the dramas.
While in Yamada Tarou Monogatari they starred as highschoolers,
in My Family they starred as a couple

Both dramas have a main character named Yamada Taro who's from very very poor family.

both drama were adapted from Manga and they are both really funny. Both main character are really funny becasue of their unique personailty that make them stand out. They both are popular in school and have a good image in school becasue of their appearance but the truth was their real personality is nothing like their appearance.
For Switch Girl, Nika looks like a beautiful high school girl, but truth is she is actually like a hot blooded old man and acts very ungraceful and unladylike.
While in Yamada Taro Monogatari, Yaamada is believe to be a rich popular guy at school, but inrealtiy he is very poor and cheap over money and is a money grubber. He does not hide the fact that he is poor but becasue he goes to an elite school (on scholarship) and looks like a rich young master ppl believe he's rich and all.
Both drama is great comdey and keeps you laughing, though they are not all comedy bc there is a some romance for the watcher too.

It's the same plot, because I
it is the taiwanese version of Yamada Taro Monogatari.