Jewelry badge brand M925, operating under the concept of "Pure Message Precious Metal," has launched a collaboration with the popular manga Eren the Southpaw — a creator coming-of-age story that has accumulated a cumulative 250 million page views — to celebrate the series' anime adaptation. Copywriter and creative director Ryo Nakagawa, together with Eren the Southpaw creator Kappy, selected a line from the work — "The mark of a pro is making something good on a shitty day" — and developed an original English copy: "MAKE GOOD EVEN ON SHITTY DAYS." The design has been crafted into a limited-edition sterling silver badge. An original illustration of character Yusuke Kamiya wearing an M925 badge, drawn by Kappy, was also released, and a talk event between Kappy and Nakagawa was held to mark the collaboration.
About M925
Pure Message Precious Metal. Carry the words that matter most.
M925 is a jewelry badge brand built around the concept of "carry the words that matter most." Words worth holding onto are engraved and polished by craftspeople onto a precious metal canvas, with a range of messages expressed on each badge. Founded by copywriter and creative director Ryo Nakagawa in Harajuku in 2025.
- Instagram: https://www.instagram.com/m925badge/
- Official Website: https://www.m925.jp/
The badge design is based on the line "The mark of a pro is making something good on a shitty day," spoken by creative director Yusuke Kamiya to protagonist Koichi Asakura in Eren the Southpaw. Chosen from the perspective of "words worth holding onto," it is a phrase that resonates with and straightens the posture of every creator. An original illustration of Kamiya wearing the M925 badge, drawn by Kappy, has also been made public.
About Eren the Southpaw
Eren the Southpaw follows Koichi Asakura — a young man who struggles with the limits of his own talent while dreaming of becoming "someone" — and Eren Yamagishi, a girl blessed with overwhelming artistic ability yet burdened by the loneliness and anguish that come with genius. The two meet by fate in high school and eventually pursue separate paths: Asakura as a designer at a major advertising agency, and Eren as an artist based in New York. Through the defeats and setbacks of two contrasting figures — ordinary and extraordinary — the story realistically portrays their journey toward discovering their true selves. It is a creator ensemble drama depicting the struggles of working adults.
TV Anime Eren the Southpaw
Broadcast
Airing from Tuesday, April 7, on TV Tokyo and affiliated networks (late night, 12:00 AM)
Streaming
Available on Prime Video from Tuesday, April 7, every Tuesday from 12:30 AM (earliest streaming)
Also streaming on other video services from Sunday, April 12, every Sunday from 12:30 AM
Story
With half of high school behind them and the pressure of choosing a path growing real, aspiring designer Koichi Asakura is one day stunned by graffiti painted on a museum wall. The artist is Eren Yamagishi — a left-handed girl who had suppressed her talent following a pivotal incident. Through the act of drawing, the two gradually come to recognize each other, and Asakura sets out on the path of a designer while Eren pursues life as a painter.
Creators
Kappy — Manga Artist / Manga Writer
Born in Kanagawa in 1985. Representative of Natsuyasumi Co., Ltd. Graduated from Musashino Art University, Department of Visual Communication Design. After working as an art director at Tokyu Agency and a planner at Kayac, he went independent as a manga artist in 2016 following the buzz around his manga Facebook Police, which he drew while still a company employee. Currently serializing Eren the Southpaw (original version on note / remake on Jump+) and Otona Taisen (Jump+ / Shueisha) on a weekly basis.
I've been thinking lately that badges are pretty great. They can prove your identity, or express who you are. They even appear as a key item in my latest work. When I heard that M925's concept was "carry the words that matter most," I had Kamiya's line — one I've always valued — engraved on it. Once you're wearing this, there's no room for excuses.
Ryo Nakagawa — Copywriter / Creative Director
Grew up in Egypt, Germany, and Shibuya. Worked at an advertising agency and a consulting firm, with experience across Tokyo, Singapore, and Australia. Launched the jewelry badge brand M925 in 2025. Key credits include work for Instagram, NIKE AIRMAX, NIKE RUN, HUMAN MADE, TRUNK, UNIQLO, the UK Government, and Spiber. Author of Hassō no Kairo (Diamond-sha) and Ikutsu ni Natte mo Haji wo Kakeru Hito ni Naru (Discover 21), and a regular contributor to BRUTUS.
- Portfolio: https://ryonakagawa.com/
- Instagram: https://www.instagram.com/ryonotrio
Before I was "Koichi Asakura," I was the sales character "Ryukawa Toshi." I joined an advertising agency wanting to do creative work, but it wasn't until my eighth year that I was fortunate enough to transfer into a creative role. For me, the world of Eren the Southpaw is almost too real — watching it feels like looking at my own past, and it can be hard to face directly. That's exactly why it has been such a source of encouragement. A creative's daily life is a battle: facing yourself, believing in yourself, proving your own value. M925 is a project that turns "words worth wearing" into jewelry badges — in other words, products that inspire the wearer. For this collaboration, I reread the entire manga and, together with Kappy, chose from the lines that moved me. We settled on the words that creative director Yusuke Kamiya says to young Asakura: "The mark of a pro is making something good on a shitty day." I rewrote that as the English copy "MAKE GOOD EVEN ON SHITTY DAYS." By wearing this silver badge — engraved with words that both motivate and remind me — I aim to push myself toward becoming the kind of creator who truly shines.
Product Details
M925 × Eren the Southpaw
MAKE GOOD EVEN ON SHITTY DAYS — "The mark of a pro is making something good on a shitty day"
Those who work in creative fields know that their mood and mental state on any given day can have a huge impact on their output. That is precisely why those who sustain long careers in creative work know how to manage their own mood — and how to give themselves a push when they need it.
- Material: Badge: Sterling Silver 925 / Pin: Alloy
- Size / Weight: Diameter 23.15mm / Approx. 5.5g
- Price: ¥35,000 (tax excluded)
Sales Information
The badge is available in limited quantities at the TV Anime Eren the Southpaw Exhibition venue. Sales end when stock runs out.
Event Details
- Dates: Saturday, April 25 – Sunday, May 10, 2026
- Venue: Yurakucho Marui 8F, Space 2
- Hours: 11:00 AM–7:00 PM (last entry 6:30 PM)
※ Hours may change depending on circumstances.
※ No timed-entry system in place.
※ The exhibition schedule and content may change or be cancelled without prior notice.
For ticketing and entry information:
- Yurakucho Marui Anime Event X: @marui_yurakucho
- TV Anime Eren the Southpaw Official: https://eren-anime.com/
(C) Kappy / Anime "Eren the Southpaw" Production Committee
