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Muji Aluminum Round Fountain Pen


Muji is a popular retail company that has spread across the globe with their policies of simple design, use of recycled materials, and the omission of branding on their goods. They carry a wide variety of items from bookshelves and bed sheets, to t-shirts and travel bags. Within their vast assortment of items is the Muji Aluminum Round Fountain Pen. True to their word, this pen has no branding and takes on a simple form out of lightweight aluminum. My first impression, upon holding the pen, was that it felt cheaper than I had expected. Although the pen is made of metal, it feels quite light. The body is actually rather thin in some places, but that is not to say that it isn’t sturdy. It feels well constructed and can probably stand up to a good amount of daily wear, but perhaps not as much as a pen machined from stainless steel, of course.

The pen is well balanced and the cap has been machined in a way that the metal circle along the bottom of the cap slides into a mirrored circular gap along the back of the pen. Along with the fact that the cap weighs very little, this means that the pen posts perfectly and is actually one of the few pens that I prefer to write with posted (it feels a tiny bit too light without the cap). The knurled metal grip section has been a point of contention for some, but I have found it pleasant to hold and rather comfortable, in the grand scheme of things. The only issue I had was the fact that the body is actually quite thin and I generally prefer larger pens, but that is a personal preference.

Despite the low-price of the pen (under $20 USD), the nib is actually incredibly smooth. It is adorned with some generic scroll work and reads, “Iridium Point.” Regardless of its place of origin, the writing experience says it all. The nib glides across the paper with ease and the feed keeps up perfectly. I have had no issues with flow or skipping.



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  • Eva Yaa Asantewaa

    September 19, 2014 at 10:40 pm | Reply

    Hi! I have a Muji and enjoy it. So far, I’ve filled it with standard cartridges (sometimes refilled cartridges to vary the colors), but I’m wondering if it would take a converter. Any idea?

    • Adam (inklode)

      September 20, 2014 at 10:21 am | Reply

      Yes! This pen will take converters. I’ve heard conflicting stories about which ones fit and which ones don’t. Unfortunately, I have yet to do any extensive testing on it, but I’ll be sure to update my review when I do!

      • Claus

        September 20, 2014 at 1:11 pm | Reply

        The Faber-Castell converter fits nicely in the Muji.

    • Glennhk

      September 21, 2014 at 8:25 pm | Reply

      You can use a Schmidt international converter (K5). Since the nib is also a Schmidt, stroke is similar to a Japanese medium in my experience with my two.

  • ashokdad

    September 21, 2014 at 11:54 am | Reply

    What is the stroke with like? Japanese medium? Something else?

    • Drew

      September 21, 2014 at 6:22 pm | Reply

      It’s very close to a Japanese fine, with all four Muji pens between me and my friends. It’s actually closer to a Sailor Medium Fine (which is closer to fine than medium).

  • Richard

    June 26, 2015 at 12:43 pm | Reply

    If I wanted to replace the nib with a Sheaffer Feather Touch 14K #5 nib, would it work?

    • Dave

      February 24, 2016 at 9:38 am | Reply

      Hi Richard, I was curious if you got an answer to this question. I love this pen, but the ink width is a bit wide for me and I was curious what other nib sizes will work in it.

      • Ted Kau

        April 7, 2016 at 5:22 am | Reply

        Yes, pray tell. The nib is too wide for my application.

  • Ralph Hua

    May 19, 2016 at 12:23 am | Reply

    Kaweco converter fits the Muji pen too.R

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