SEED
Making tools to erase. Making writing feel lighter.
Founded in 1915, SEED is a Japanese maker dedicated to "tools for erasing" — from erasers to correction tapes. The head office and main factory are in Toyonaka, Osaka, with an East Japan sales office in Asakusabashi, Tokyo. Capital is 40 million yen and the company has 49 employees, plus a related company in Vietnam. Its best-known icon is the blue-cased "Radar" plastic eraser, loved for its erasing power in Japan and beyond. SEED also helped shape modern correction tape and develops products like the Horunavi series for eraser stamps, expanding the ways we write, draw, and create.
Why We Love It
Start with a classic: a blue Radar eraser for your notebook or planner. Pair it with a Pi-mo correction tape on busy writing days to keep revisions smooth. For a weekend project, try Horunavi and carve a small eraser stamp. If you like comparing tools, line up Radar variants — limited or premium — and see how different "erase feels" fit different moments. SEED's kneaded erasers and cleaning-type erasers also open up more ways to erase beyond the desk.
PROFILE About the Company / Workshop
SEED was founded in September 1915. Its head office and factory are based in Toyonaka, Osaka, and it also runs an East Japan office in Asakusabashi, Tokyo. The president is Futoshi Tokuyama. With 40 million yen in capital and 49 employees, the company develops, manufactures, and sells products related to erasing — erasers, correction tapes, kneaded erasers, and even clay. A related company, SEED VIETNAM CO., LTD., is also listed.
The brand icon is Radar, the blue-cased plastic eraser. SEED's history includes launching plastic erasers early on, and Radar has been valued for its erasing power for years. It's a long seller used in Japan and abroad. Beyond the core Radar line, SEED also maintains categories like limited editions and premium options, leaving room to choose by feel.
Another milestone is correction tape. SEED is associated with the first correction tape, changing how people rewrite. Today the correction tape category continues with series such as Pi-mo. On the eraser side, the range spans kneaded erasers, art-focused lines, and pen-type series, plus Horunavi for eraser stamps. Different tools let you choose how you erase for different needs.
SEED also offers ways to learn the background. There are pages explaining how erasers are made, trivia, an eraser museum section, and a story of correction tape development. The site also includes information on eraser safety. With a downloadable product catalog and guidance for original product development, it supports both everyday users and business inquiries through clear contact channels.
The blue "Radar" as a desk staple
Radar, the blue-cased plastic eraser, is one of SEED's signature products. Its erasing power has been trusted for years, not only in Japan but also overseas. The lineup includes Radar, limited Radar editions, and premium categories, giving you room to choose the feel you like.
Correction tape that became a global standard
SEED is known as one of the makers that pioneered correction tape, now an everyday tool worldwide. The category includes series such as Pi-mo, designed to keep rewriting simple and steady. It helps you correct without breaking the rhythm of writing.
Erasers for making, too: Horunavi
Horunavi is SEED's eraser-stamp series for carving designs into an eraser and turning them into stamps. It brings a small "make something" moment closer to everyday life. Supporting items — like dedicated cleaners — help you keep the hobby going.
Erasing ideas beyond stationery
SEED also offers products for everyday cleaning under its "lifestyle care" lineup. That includes cleaning-type erasers made with material ideas such as volcanic ash (Shirasu), plus types suited to tasks like sticker residue removal. The "erase" mindset extends beyond paper.
PRODUCTS Featured Products & Services
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Radar Plastic Eraser (e.g., S-100)
A classic blue-cased Radar plastic eraser — long valued for its erasing power and known as a steady long seller in Japan and beyond.
Pi-mo Correction Tape (e.g., PM5H)
One of SEED's correction tape series. A practical choice for keeping revisions smooth in notebooks and documents.
Horunavi (Eraser Stamp Series) Starter Set
An eraser-stamp series designed for carving and making stamps. A simple way to bring "making" into daily stationery time.
Radar Knock-Type Eraser (e.g., Radar Knock 2)
A knock-type Radar that lets you extend and use the eraser with quick control. Handy when you want to erase without breaking your writing flow.