Compiled from 9 sources; we haven't tested this product ourselves yet. How we research
Quick answer
The KOKUYO Campus eraser that erases well but doesn't break easily (よく消えるのに折れにくい消しゴム) is a PVC eraser launched in Japan in September 2025. A hybrid formula pairs graphite-grabbing and break-resisting ingredients. It comes as a 66° parallelogram or a rectangle, in two sizes, white or black, and won a 2026 Japan Stationery Award.
On this page10 sections
Parallelogram M and Rectangle M, both 54 mm long (drawn at 1 mm = 4 px).
Product facts
Product
KOKUYO Campus eraser that erases well but doesn't break easily
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Notes on these facts
Made by KOKUYO Co., Ltd.. Country of manufacture not stated: KOKUYO's Japanese spec pages, RX Japan's winners page and DIME don't state a country of manufacture. Price: example listing. Released: DIME (2026) says the eraser went on sale in September 2025.
Price bands are typical US retail, checked October 2026. Conversions to US dollars are approximate, at October 2026 rates (US$1 = ¥158 = ₩1,330 = NT$32.5 = CN¥6.7 = SEK 9.9 = DKK 6.7 = ₺49.6 = C$1.41 = A$1.43 = CZK 21.7; €1 = US$1.12; £1 = US$1.32; CHF 1 = US$1.21).
Key takeaways
KOKUYO lists four sizes: parallelogram M 25 × 54 × 13 mm, parallelogram S 20 × 42 × 13 mm, rectangle M 24 × 54 × 12 mm and rectangle S 18 × 42 × 12 mm.
KOKUYO's list prices run from ¥90 (about US$0.60) to ¥150 (about US$0.90) before tax for a single eraser.
KOKUYO says development took 5 years, and testers tried 7 prototypes in 3° steps before it settled on a 66° parallelogram.
It won a 35th Japan Stationery Award (2026) in the sustainable category, announced by RX Japan on June 9, 2026.
JetPens lists the medium parallelogram in the US, and Japan-import packs appear on Amazon.com.
What is KOKUYO’s eraser that erases well but doesn’t break easily?
It is a Campus-brand PVC eraser from KOKUYO, sold in Japan since September 2025, made to erase cleanly without snapping in half. KOKUYO’s Japanese name, よく消えるのに折れにくい消しゴム, says exactly that.
KOKUYO explains the trade-off on its page: soft erasers erase well but break, and hard ones don’t break but leave marks. Its answer is a “hybrid” formula that locks a graphite-grabbing ingredient inside a stiffer skeleton ingredient.
It is the first eraser under Campus, KOKUYO’s best-known notebook brand; see our KOKUYO Campus notebook guide for the notebooks.
What sizes and shapes does it come in?
Two shapes, a parallelogram and a rectangle, each in M and S, in white or black. All figures are from KOKUYO’s Japanese spec pages, read October 23, 2026.
Version
Code (white / black)
Size (W × L × T)
List price before tax
Parallelogram M
ESR-C02 / ESR-C02D
25 × 54 × 13 mm (1.0 × 2.1 × 0.5 in)
¥150 (about US$0.90)
Parallelogram S
ESR-C01 / ESR-C01D
20 × 42 × 13 mm (0.8 × 1.7 × 0.5 in)
¥100 (about US$0.60)
Rectangle M
ESR-C12 / ESR-C12D
24 × 54 × 12 mm (0.9 × 2.1 × 0.5 in)
¥140 (about US$0.90)
Rectangle S
ESR-C11 / ESR-C11D
18 × 42 × 12 mm (0.7 × 1.7 × 0.5 in)
¥90 (about US$0.60)
KOKUYO also sells 1-, 2-, 3- and 5-packs. The body is PVC, and the paper sleeve contains recycled pulp and has perforations, so you tear it down as the eraser wears instead of cutting it.
The four shapes, end and top views at 1 mm = 3.2 px.
Why is it a parallelogram?
KOKUYO says the slanted block is easier to lift off a desk and to press with little force. It developed the shape through HOWS DESIGN, its inclusive design process, with three workshops that included people with weak grip.
KOKUYO’s magazine says the project took five years and that testers tried seven prototypes, changed in 3° steps, before it chose 66°. Because some testers still preferred a plain block, KOKUYO kept the rectangle too.
The designer told KOKUYO’s magazine the eraser feels a little softer than KOKUYO’s Resare Premium but still erases small areas precisely. That is a maker’s description; we haven’t tested it yet.
Why did it win a Japan Stationery Award?
RX Japan gave it a 2026 Japan Stationery Award in the sustainable category, citing the hybrid formula and the inclusive design process. The 35th award named 12 winners on June 9, 2026; see our Japan Stationery Award 2026 winners for the full list.
RX Japan’s entry calls the process a step toward well-being for each user. An eraser that doesn’t snap is also one you finish instead of losing in pieces, and KOKUYO marks the line with its own resource-recycling concept logo.
How does it compare with other Japanese erasers?
It sits between soft, clean-erasing blocks and firm precision erasers, and its main difference is shape.
Yes, in part: JetPens lists the medium parallelogram, and Amazon.com has Japan-import packs. When we checked on October 23, 2026, Amazon.com showed a two-pack of 3-piece parallelogram M sets as a Japan import. A single eraser sits in our $ band (under $5); the black and S sizes are easier to find from Japanese stores or proxy services.
Where is it made?
KOKUYO doesn’t say. Its Japanese spec pages give the materials and JAN codes but no country of manufacture, and neither RX Japan nor DIME states one.
Frequently asked questions
What does the Japanese name of the KOKUYO Campus eraser mean?
よく消えるのに折れにくい消しゴム means "an eraser that erases well but doesn't break easily," which is also its whole pitch. Retailers in English often shorten it to the KOKUYO Campus eraser.
Why is the KOKUYO eraser shaped like a parallelogram?
KOKUYO says the slanted shape is easier to pick up off a desk and to press with little force. People with weak grip tested prototypes in workshops, and KOKUYO picked a 66° angle from seven versions.
Is the KOKUYO Campus eraser soft or hard?
In between. KOKUYO says it is a little softer than its Resare Premium eraser, but firm enough to erase small areas precisely.
Can I buy the KOKUYO Campus eraser in the US?
Yes. JetPens lists the medium parallelogram, and Japan-import multipacks are on Amazon.com. Other sizes and the black versions are easier to find from Japanese stores.
What award did the KOKUYO Campus eraser win?
A 35th Japan Stationery Award (日本文具大賞 2026) category prize in the sustainable section, one of 12 winners named by RX Japan on June 9, 2026.
Is the KOKUYO Campus eraser made in Japan?
KOKUYO doesn't say. Its Japanese spec pages list the materials but no country of manufacture.
