JetPens®.com - Love at First Write®
Free Shipping
On Orders Over $25!

Hinodewashi Matomaru-kun Knock Eraser

  2.8  4 reviews | Write a Review

Hinodewashi Matomaru-kun Knock Eraser - HINODEWASHI NM-200
  • Hinodewashi Matomaru-kun Knock Eraser - HINODEWASHI NM-200
  • Hinodewashi Matomaru-kun Knock Eraser - HINODEWASHI NM-200
  • Hinodewashi Matomaru-kun Knock Eraser - HINODEWASHI NM-200
  • Hinodewashi Matomaru-kun Knock Eraser - HINODEWASHI NM-200
This item is no longer available for sale on

With your math brain on, you've just written out your 10-step solution to the latest puzzler. But to your dismay, you find a mistake in step 3! You must erase steps 3-10 and start all over. You grab your Matomaru-kun and erase. With this soft eraser, not much pressure is needed to erase cleanly. Best of all, the shavings gather into neat clumps, so you are not left in the end with a dust bowl of eraser shavings. Some clumps stick to the eraser, making it even easier to pick them up and throw away. Because little effort is needed for erasing and clean-up, you can spend all your energies on re-tackling that math problem.

The name says it all for Hinodewashi's Matomaru-kun eraser -- "Matomaru" means "collects" or "gathers," and the eraser shavings do indeed gather neatly into clumps for easy clean-up, leaving you with a clean desk.

The eraser is available in a variety of sizes and forms. With this knock model, the eraser is dispensed by pressing the top button. Refills are available.

Dimensions: 4.9 inches length, 0.5 inches diameter (12.4 cm length, 1.3 cm diameter)

Model NumberHINODEWASHI NM-200
Weight0.6 ounces
Body Color Blue
Body Material Plastic
Clip Material Plastic
Clippable Yes
Diameter - Max 7 mm
Eraser Color White
Eraser Refillable Yes
Eraser Type Knock
Features Dust-Gathering
Mechanism Knock
Size - Depth 1.4 cm
Size - Length 12.4 cm
Size - Width 1.4 cm


February 1, 2013
Poorly Designed Delivery...
Verified Purchase
Poorly Designed Delivery System

It is unfortunate and very surprising that this, arguably the best earaser out on the market, should come with such poorly designed delivery system. The delivery system is of the passive type, as in Pentel's Tri-Eraser. Whereas Pentel's Tri-Earser has a tiangular cross-section allowing the holder's three large clamps grip the flat sides of a relatively hard eraser, the Hinodewashi's eraser has the more commom circular cross-section, as a result, the holder's four small clamps do not have much to hold on. Further more since the earser itself is soft, the points in contact with the clamps errode quickly. The bottom-line is this: the eraser is useless in the current configuration.

For the first few uses it works fine, but as the contact points errode, the eraser element move in and out of the holder with ease while erasing which is what makes it useless. After trying to find a workaround and even using different holders, I gave up, cut the eraser in short segment and used them without a holder. I discarded the holde.

If you are looking for pen-type Hinodewashi earser, try their paper-rolled type which is an excellent 5-star eraser and delivery system. You can find it at JetPens here

6 people found this helpful
October 20, 2012
This eraser erases well....
Verified Purchase
This eraser erases well. However the clicking mechanism remains a lot to be desired.

1.) When clicking, the eraser may/may not come out
2.) When erasing, the eraser does not stay in place. Instead multiple incidences when the eraser would simply retract back into the cartridge.

4 people found this helpful
January 2, 2013
I bought this because...
Verified Purchase
I bought this because I had read reviews about how awesome Hinodewashi erasers worked and I needed a replacement for my Staedtler Mars Plastic pen-style eraser which is difficult to find refills for anymore. I did not have a problem with the eraser advancing when I clicked it as another reviewer did--it always worked. However the cleats are not firm enough to hold the eraser in place and it does slide back into the barrel if you bear down hard. It does erase very, very good without having to press down that hard in the first place. Although I prefer pen-style erasers, anyone else should probably just buy a block Hinodewashi eraser instead.

2 people found this helpful
April 26, 2014
i like this eraser so...
Verified Purchase
i like this eraser so far the letters wore off it was on sale and decided to try it the eraser mechanism isnt the best but works great fits in my saki pencil bag, also another reason why i like it it fits in my bag so i bought tons of refills and bought one for me and my fiance. less than 3 bucks not bad...not bad at all.