How Brook Ended Up on a Casino Chip in One Piece Film Gold

Brook One Piece Film Gold Casino Chip Earphone Strap (Japan, 2016)

A Casino Chip for Your Phone, Straight from Gran Tesoro

This is an earphone jack accessory — sometimes called a dust plug strap — designed to fit into the 3.5mm headphone port of a smartphone or portable music player. The body is a flat circular disk made to look like a casino chip: Brook’s character illustration sits against a dark teal background at the center, and the outer edge is lined with white rectangular sections that echo the markings on real casino chips. A short cord connects the disk to a silver-toned bead and a black silicone dust plug. The plug keeps the headphone jack clean while anchoring the whole charm. The product carries a “Japan Limited” label, meaning it was manufactured for the Japanese domestic market and sold through channels not accessible to overseas buyers at the time of release.

The Film, the Character, and Why the Design Fits

One Piece is the manga series Eiichiro Oda has been writing and drawing for Weekly Shonen Jump since 1997. It remains in serialization as of 2025, and by 2023 had surpassed 500 million copies in print — a Guinness World Record. The anime adaptation has aired since 1999, and the franchise has produced a long run of theatrical films. This strap ties to the thirteenth of those films: One Piece Film Gold, released on July 23, 2016, by Toei Animation. The story is set on a vessel called Gran Tesoro, described as the world’s largest entertainment city ship, built around a theme of casinos, gambling, and gold. The casino chip shape of this strap is a direct visual quote from that setting — not a generic design choice, but one that places the object firmly inside the film’s world. One Piece Film Gold opened at number one at the Japanese box office on its debut weekend.

Brook, the character whose illustration fills the chip’s face, is the Straw Hat Pirates’ musician, known by the title Soul King. He ate the Yomi Yomi no Mi, a Devil Fruit that returned his soul to his body after death, leaving him alive in skeleton form. His look is immediately recognizable: a full skeleton frame topped by a large black afro, a yellowish crown, and sunglasses. Among the Straw Hat crew, Brook is the member whose silhouette reads most clearly at small scale, which makes him a practical fit for compact merchandise formats. International fans also know him for his recurring joke about asking to see people’s underwear — a running gag that has given him a comedic personality as memorable as his appearance.

The Last Wave of an Earphone Jack Accessory Era

The character strap is a Japanese mobile accessory tradition that traces back to the early 2000s, when decorative charms hung from flip phone straps. As smartphones took over, the format shifted to 3.5mm headphone jack versions. By the mid-2010s, anime film merchandise regularly included this type of item: a character-themed plug charm sold at movie theater goods counters, specialty anime retailers, or studio merchandise shops, timed to coincide with a film’s theatrical run. This strap follows that model, though the exact sales venue and manufacturer are not confirmed — One Piece film merchandise during this period came from several companies, including Bandai, Takaratomy Arts, and Movic, among others.

What gives 2016 an additional layer of context is that Apple removed the 3.5mm headphone jack from the iPhone 7 in September of that year. After that, production of earphone jack accessories contracted sharply across the industry, and what had been a standard format for anime goods effectively wound down. A strap produced in 2016 sits at the very end of that era, giving it a small but genuine place in the broader history of Japanese character merchandise.