---
product_id: 262741288
title: "MUJI Moma Aluminum Fountain Pen"
brand: "muji"
price: "€ 40.22"
currency: EUR
in_stock: true
reviews_count: 6
category: "Muji"
url: https://www.desertcart.ie/products/262741288-muji-moma-aluminum-fountain-pen
store_origin: IE
region: Ireland
---

# 13.7 cm sleek length 20g ultra-lightweight Precision-made in Japan MUJI Moma Aluminum Fountain Pen

**Brand:** muji
**Price:** € 40.22
**Availability:** ✅ In Stock

## Summary

> ✒️ Write your success story with sleek precision.

## Quick Answers

- **What is this?** MUJI Moma Aluminum Fountain Pen by muji
- **How much does it cost?** € 40.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/262741288-muji-moma-aluminum-fountain-pen)

## Best For

- muji enthusiasts

## Why This Product

- Trusted muji brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Featherlight Elegance:** At just 20g, it’s the perfect balance of comfort and style for all-day writing.
- • **Japanese Craftsmanship:** Engineered in Japan for unmatched quality and smooth nib performance.
- • **Smooth Writing Experience:** Enjoy a nib smoother than pens costing 10x more—turn every word into art.
- • **Streamlined Sophistication:** Compact 13.7 cm length fits effortlessly in your hand and your professional toolkit.
- • **Versatile Ink Compatibility:** Works with Muji’s proprietary cartridges and standard international refills for hassle-free use.

## Overview

The MUJI Moma Aluminum Fountain Pen is a lightweight, compact writing instrument crafted in Japan, featuring a smooth nib that rivals premium pens at a fraction of the cost. Its durable aluminum body and compatibility with both Muji and international ink cartridges make it a stylish, practical choice for professionals who value quality and understated elegance.

## Description

MUJI Moma Aluminum Fountain Pen,MUJI Moma Aluminum Fountain Pen

Review: Beautiful - What a Fantastic Fountain pen Smooth and Elegant Works with art and writing Such an investment
Review: I own many fountain pens (possibly too many) and this is one of my favourites. It's compact, comfortable, very light, and stylish. It also has one of the smoothest nibs I own which makes it a pleasure to write and sketch with. In fact it has a smoother nib than other pens in my collection that cost ten times as much making it fantastic value. I've no idea if I was lucky to get such a smooth nib with my first Muji fountain pen but I've read other positive accounts so perhaps it's a sign of great quality control. The only minor negative point I can think of is that it comes with only a small international cartridge but this means it can be used with a large international cartridge or convertor so it's easily remedied. Some people classify this as a starter pen and while I think it's true that its low cost and ease of use put it in the same league as the Lamy Safari and Pilot Metropolitan and it's not as fancy as high-priced pens it's definitely a pleasure to use at any time. Highly recommended.

## Features

- Weight: 20g
- Compatible ink cartridges: Muji 5-139040 (５－１３９０４０)
- Made in Japan
- Dimensions: total length 13.7 cm (with cap), diameter 1cm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MDRZLHA |
| Best Sellers Rank | #22,297 in Office Products ( See Top 100 in Office Products ) #183 in Fountain Pens |
| Brand | MUJI |
| Closure | Click-Off Cap |
| Color | Black |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,492) |
| Date First Available | 14 September 2014 |
| Grip Type | Smooth |
| Ink Color | Black |
| Item Weight | 20 g |
| Line Size | 0.3mm |
| Manufacturer | Other |
| Manufacturer Part Number | 15136865 |
| Material Type | Metal Aluminium |
| Model number | 15136865 |
| Number of Items | 1 |
| Pencil Lead Degree (Hardness) | Fine |
| Point Type | Nib |
| Product Dimensions | 13.7 x 1 x 1 cm; 20 g |
| Size | 2 Piece Set |

## Product Details

- **Age range (description):** Adult
- **Brand:** MUJI
- **Colour:** Black
- **Ink colour:** Black
- **Writing instrument form:** Fountain Pen

## Images

![MUJI Moma Aluminum Fountain Pen - Image 1](https://m.media-amazon.com/images/I/41qDjK6Iw3L.jpg)

## Questions & Answers

**Q: What converter would be compatable with this pen?**
A: in this pen, it requires a standard international converter, but since the shape of the intake is slanted like a standard international cartridge, many of the chinese standard int'l converters won't work (since they're like cylinders with standard int'l bore, and not tapered). you're gonna wanna look for a standard international converter that has the smaller, slanted part at the front instead of just being a barrel.

brands that do fit: schmidt (the K5), monteverde, montblanc, waterman, rotring, and some select moonman ones.

brands that do NOT work (unless you're willing to file off some from the front to make it fit): jinhao, hero, penbbs, most chinese brands.  

basically any standard international converter that costs more than $5 will probably fit lol. 
i'd recommend the schmidt k5 because this pen has a schmidt nib/assembly, so it's like for sure compatible.

if anyone finds a cheap chinese brand that has a properly shaped converter, please contact me because so many pens have this problem, and i want to buy 20 of them.

**Q: What size nib us on this pen?**
A: By comparing this with other pens I have, I would say this is a bit finer than 0.7mm (medium), but visually heavier than 0.5 (fine). Frankly, if it were near a fine nib, I wouldn't like it; and I like this pen a lot!

**Q: What size is the nib?**
A: It's a fine nib. Good flow. Smooth writing.

**Q: Does it come with ink?**
A: Yes, one ink cartridge is attached.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Beautiful
*by M***D on 19 October 2025*

What a Fantastic Fountain pen Smooth and Elegant Works with art and writing Such an investment

### ⭐⭐⭐⭐⭐ Review
*by A***T on 16 March 2023*

I own many fountain pens (possibly too many) and this is one of my favourites. It's compact, comfortable, very light, and stylish. It also has one of the smoothest nibs I own which makes it a pleasure to write and sketch with. In fact it has a smoother nib than other pens in my collection that cost ten times as much making it fantastic value. I've no idea if I was lucky to get such a smooth nib with my first Muji fountain pen but I've read other positive accounts so perhaps it's a sign of great quality control. The only minor negative point I can think of is that it comes with only a small international cartridge but this means it can be used with a large international cartridge or convertor so it's easily remedied. Some people classify this as a starter pen and while I think it's true that its low cost and ease of use put it in the same league as the Lamy Safari and Pilot Metropolitan and it's not as fancy as high-priced pens it's definitely a pleasure to use at any time. Highly recommended.

### ⭐⭐⭐⭐⭐ Review
*by D***A on 12 March 2021*

Good fine nib

## Frequently Bought Together

- MUJI Aluminum Fountain Pen
- Schmidt Universal Fountain Pen Ink Converter
- Muji Aluminum Body Fountain Pen Cartridge Refills,2 Black Ink Refills

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-21*