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The story focuses on salaryman Densuke Hamasaki (a.k.a. Hama-chan), whom his supervisor Sasaki has dubbed the "Crazy Fisherman" because of his passion for fishing. One day Hama-chan meets and befriends an older fisherman named Su-san, who turns out to be Ichinosuke Suzuki, the CEO of the "Suzuki Construction" company that Hama-chan works for. The stories tend to focus on their relationship inside and outside of the office.
Densuke Hamazaki is an office worker at Suzuki Construction and gets transferred to the main Tokyo office. After settling in to his surrounding along with his wife Eri, Densuke befriends an elderly man named Ichinosuke Suzuki. Ichinosuke is a lonely and old man who learns to enjoy life again through his friendship with Densuke. Meanwhile, Densuke is completely unaware that Ichinosuke is the boss of his construction company. The two men become friends through their shared passion for fishing.
Hama-chan gets Su-san hooked on fishing, but Su-san has some problems to deal with; a beautiful woman saves Su-san when he collapses while fishing.
Su-San invites Hama-chan to go fishing at a place close to his heart after learning about Hama-chan and his wife's fertility problems.
Hama-chan and his wife are ecstatic about their long-awaited pregnancy. Meanwhile, Su-san's nephew joins Hama-chan's department at the company.
Hama-chan shows up to work with his son on his back when his wife goes to her class reunion and his mother throws her back out.
Hama-chan and Su-san go fishing during a business trip, but Hama-chan has to give a lecture on Su-san's behalf in a case of mistaken identity.
Approached by a friend about a matchmaking arrangement, Su-san goes to Hama-chan's home seeking help. Hama-chan is away on a business trip, but Michiko entertains Su-san late into the night. When he gets drunk and ends up spending the night, Hama-chan, begins to question his boss's relationship with Michiko.
Hama-chan and Su-san meet a charming woman on a fishing trip, but forget to ask her name. Days later, Hama-chan sees her again at a dentist's office.
When Su-san invites his late friend's daughter to come along on a fishing trip, she falls in love with Hama-chan's fishing protégé.
Hama-chan’s sales department gets a new supervisor, a hard-working taskmaster that’s the very opposite of carefree, irresponsible Hama-chan. The veteran employee decides to find his boss, a divorced father, a new wife. The supervisor loves a bar hostess “mama-san,” but is unable to confess his true feelings until Hama-chan comes to his rescue.
Su-san resigns after getting fed up with corporate life, but he finds himself back in familiar surroundings on his first assignment at a new job.
A traveling ronin perceived as a fool impresses a samurai leader with his fishing skills and gains employment.
Hama-chan accompanies Su-san on a business trip to Okinawa in the middle of the recession, but Su-san remains in low spirits over business matters.
Mr. Takano, a company employee, announces plans to take an early retirement so he can return to his home town and spend his days fishing. Su-san and Hama-chan envy his decision, and Hama-chan conspires to visit Takano, even though he has no vacation time left.
When unexpected trouble arises with an account Hama-chan brought in, he's sent to Toyama with his beautiful colleague to fix the problem.
Hama-chan's supervisor is promoted after many frustrating years with his wayward, fishing-obsessed underling, and Hama-chan's new boss naively tries to retrain him. Later, Su-san and Hama-chan go on a business trip, where they meet a beautiful, warm-hearted truck driver.
Hama-chan takes a vacation to go fishing in Akita despite warnings from Su-san as his company faces a restructuring process.
Hama-chan meets a friendly US soldier on a trip to Nagasaki with Su-san. Su-san returns to Tokyo and is informed that Hama-chan has gone missing.
Yumiko returns to work in Hama-chan's department. She had once left the company after getting married, but a dark shadow now seems to loom over her.
Hama-chan goes to Okayama to look for Su-san when he goes missing a few days after freezing up during his inaugural speech as the company chairman.
Hama-chan joins a company excursion to Oita with the rest of his department including his new junior Daisuke. Beautiful Namiko, the organizer of the trip is a contract employee and her elder brother is a fisherman. Hama-chan, as always sets out to sea for a bout of angling. He is a tad surprised when Namiko's brother consults him about Namiko's status as an unmarried contract worker...
