Salaryman Kintarou

Charismatic ex-biker gang leaders deciding to go straight and narrow, becoming productive members of society. Seinen animes with adult male protagonists, with focus on comedy, drama, workplace, and even some romance. The men also have a habit of getting into a lot of fights and other trouble. 

Both Gokusen and Salaryman Kintaro show the lives of two individul who both follow their dream career while trying to balance their personal live. In Gokusen Kumiko Yamaguchi is a young woman who has dreamed her whole life of being a school teacher. However she has a seceret. She is the heiress to the Oedo Yakuza clan. She becomes a teacher to a class of troubled students and tries to keep her secret as she shepherds her students toward graduation. Whilst in Salaryman Kintaro the main character of the story is Yajima Kintaro, a former leader of a feared biker gang. He then decides to choose a different path as a salaryman and a responsible father for his young son after his late wife passed away. read more 

Representativeness of the life of bullies, their daily life, how they live and how they deal with society having this view that everyone has of them. 

In both series the protagonist is a young man called Kintarou, with different chinese characters for the „Kin“. One of these works in a corporation, the other one works for another employer in each episode. Apart from that, they have much in common I think. Both Kintarous like to move on two wheels and have a strong sense of individuality. They do not respect rules and ranks out of principle, but follow their ideals. They also have a rather optimistic view of life and people, without ignoring the dark sides. Their adventures follow the same schme: They get an assignment, run into problems, and solve them in an unorthodox way, making friends along the way. Also some themes (corruption, making allies, educate people) are similar. If you want to see a headstrong protagonist solving problems, winning friends and progressing in life, both series may be of interest for you. read more 

They are totally different in the atmosphere but they both are seinen, and they both share a Mature Romance plus the main character in both is an awesome businessman, who is an adult with his own moral for good. If you like Arakawa, you may like Salaryman Kintarou. 

Indeed, even if their atmosphere are totally different (salaryman is more serious and Rec more romantic comedy), they both have three important elements: 1.Realistic Problems, based on work or on relationships (boss-employed, etc) 2.Mature Romance, for once, if thats you're looking for. 3. The World of the Business, but it's a little better represented on Salaryman Kintarou 

O.K. Salaryman Kintarou has absolutely nothing to do with mecha but, like Dai-Guard, is is a fun peek into Japanese corporate culture. The main character's nonconformity shakes things up and gets things accomplished. It's a fun show.