TV-Series
Description
Mr. Shiowatari is the father of Nagisa Shiowatari and a close friend of Mr. Fujinami. He operated Hamachaya, a beach café on a remote island four miles offshore, which struggled due to its isolation. To attract customers, he created sea urchin-flavored kakigori. While testing this recipe, he consumed 98 consecutive bowls and died from overeating; Nagisa later died after consuming 166 bowls. This event transformed both into restless spirits haunting the island for a year.

As a ghost, he gained abilities including invisibility and intangibility. He contacted Mr. Fujinami to sell the island for 300 yen, facilitating Nagisa's introduction to Ryūnosuke Fujinami, Mr. Fujinami's son and Nagisa's arranged fiancé. To secure his son's happiness, Mr. Shiowatari revealed that the tear of a giant sea urchin visiting the island could resurrect Nagisa. After Nagisa consumed the tear and was revived, Mr. Shiowatari's regrets dissipated, allowing him to pass peacefully into the afterlife at dawn.

Physically, he presents as a plain-featured man with a slender build, a small mustache, and round rimless glasses. He typically wears a bandanna and a shirt featuring the phrase "I (heart) sea urchins."

His personality combines affability with delusion. He insisted Nagisa was a "late-blooming girl" despite biological evidence, mirroring Mr. Fujinami's delusion. His poor business acumen was evident in the café's remote location and the unappealing signature dish. However, he diverged from Mr. Fujinami's harshness through his gentle, patient, and deeply caring treatment of Nagisa. Their relationship was harmonious, with Nagisa willingly humoring his father's beliefs. He prioritized Nagisa's well-being, sacrificing his own chance at resurrection. He also exhibited a playful, prankster side, sometimes pretending to be a conventional scary ghost.

His bond with Mr. Fujinami originated from a shared vow to engage their children, believing this would unite their families. This led him to raise Nagisa as a girl, assuming Mr. Fujinami had a son. Their similar delusional traits and business failures formed the foundation of their friendship.