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🖊️ Write sharp, live smart — the pen that means business.
The Mitsubishi Pencil UMNSP38.81 Uni-Ball One P is a sleek, refillable gel ballpoint pen featuring a precise 0.38mm fine tip and vibrant black hybrid ink. Its compact, lightweight design offers ergonomic comfort for all users, while the smooth, smudge-resistant ink ensures a flawless writing experience. Perfect for professionals seeking style, sustainability, and performance in one elegant package.
| ASIN | B0BZHCZTC8 |
| Additional Features | Pockets |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #4,896 in Office Products ( See Top 100 in Office Products ) #130 in Ballpoint Pens |
| Body Shape | Round |
| Brand | 三菱鉛筆 |
| Brand Name | 三菱鉛筆 |
| Closure Type | Retractable |
| Color | soda |
| Customer Reviews | 4.4 out of 5 stars 4,657 Reviews |
| Drill Point | Fine |
| Grip Type | Smooth |
| Hand Orientation | Ambidextrous |
| Included Components | Ink Cartridge |
| Ink Base | Hybrid |
| Ink Color | Black |
| Item Diameter | 0.38 millimeters |
| Item Dimensions | 4.6 x 0.55 x 0.76 inches |
| Item Type Name | Gel Ink Ballpoint Pen |
| Item Weight | 0.01 kg |
| Line Size | 0.38mm |
| Manufacturer | 三菱鉛筆(Mitsubishi Pencil) |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | ユニボールワンP |
| Model Number | UMNSP38.81 |
| Pattern | single item |
| Recommended Uses For Product | Writing |
| Style | Refillable |
| Theme | Love |
| Unit Count | 1 Count |
| Writing Instrument Form | Ballpoint Pen |
S**E
Chunky little pen
I love this pen! I bought it for my boyfriend, and he loves it as well. The ink is smooth and easy to write with. He's a leftie, and it doesn't smudge terribly. I haven't experienced any issues with leakage or broken parts. There's no soft grip, and the small size is a bit of an adjustment. The clip isn't the strongest if you're trying to clip it onto something thicker than a few pages, but it's a good little pen overall. The color selection is very nice, and the grape color is accurate to the photo.
A**Y
An excellent pen
This is pretty much a perfect pen in my opinion. It's extremely ergonomic, even for my large hands. It's functional, especially the clip which is much sturdier than standard plastic pen clips. And it writes beautifully. It dries almost instantly, this is one of the few pens I use that almost never smears. It's just fantastic. The only downside is the high price but honestly I love this thing so much that I can't even complain about that.
M**L
Great little pen
Love how smooth it writes. Ink flow has been great. It is a cute size but could be hard to use with larger hands. My kids love them. It looks nice and the price is great. I just wish there was an even finer point refill option.
A**R
Works great, writes smooth, and a good size for those with hand issues.
This pen is so cute! I love the color I got. It's a nice light sage color, one of my favorites. The barrel is about half an inch thick so it does take some getting used to when you first use it but it's totally worth it. The body feels slightly rubberized so you should have a good grip on it when you write. It writes so smoothly I absolutely love it, even with the 0.38 nib. I have a love-hate relationship with ballpoint pens and usually stick to fountain pens but this pen made me reconsider. The ink goes on paper very smoothly and dries relatively quickly. I use it on my Tomoe River paper notebooks and havent noticed any bleed throughs, especially on my Hobonichi Weeks.
B**A
My Favorite Pen EVER
My Favorite Pen EVER!!!! It's so Smooth!!!! And Thin Lines!!! So Happy!!! Not to mention that the color is sOoo Lovely!!!! I like how stubby it is and though it's chunky it feels good in my hands which are on the small side 🩷🍵
Ḵ**W
Best ink pen I own
0.38 pen is great for my Hobonichi Techo Weeks; thin writing is ultra fine and clear. Works well on Tamoe paper: smooth and dries relatively fast (no blotting or blowing dry as with fountain pens). Standard black ink is not streaky but is very clear. The chubby barrel relieves my hard grip as I write, and I find I can write a bit longer than with a thinner barreled pen. Soda is a nice color and helps determine ink colors I keep (red black blue). I use it daily for Techo, notes to mom, and sermon notes. Never thought a Japanese pen would make a difference in my writing but the high quality understated function and minimalist design is the best. The size fits comfortably in my small hand, the ink refill lasts me maybe a month? Since I use all 3 ink colors it depends on which ink color I’m using ….
A**R
Love it but skips when writing
I love how it looks and I love the drag of the pen when writing, it feels vaguely like a fountain pen. However, since day 1 I had issues with it skipping and not wanting to write. It's every few words, so definitely frustrating and if I have a lot to write I know not to use this anymore. I hoped with age it might be smoother but I've had it over a year, using fairy frequently at times, and keep having the same issues. It's super cute though! I love the size, it fits nice in a pocket, and it writes well when it works so I'm still keeping it for small tasks.
A**S
Best small pen ever!
I love this pen!!! It's my absolute favorite and almost my trademark at work. The size is perfect to fit in a pocket -- I even accidentally washed it once with no harm done! It has a small, chunky size and writes well. I have replaced the ink several times because I use it so much.
M**L
Calidad
Mini bolis de una calidad impresionante. Fluidez en la escritura. Pequeño y agradable al tacto. Diseño limpio y bien acabado.
I**I
Inte värd hypen
Torkar ut snabbt och inte alls värd hypen. muji gör Det 100000x bättre
A**R
Perfect everyday pen
The Uni-ball One P is an excellent compact pen with a smooth ink flow and very comfortable grip. The ink is rich and vibrant, making writing feel clean and precise, while the small size makes it perfect for carrying every day. Despite its minimalistic design, it feels surprisingly premium and well made.
P**E
Fantastische inkt
Als je niet goed meer je pen kunt vasthouden of op dun papier moet schrijven echt de pen om te gebruiken. Fantastische inkt en 0,38 mm is prima om klein mee te schrijven
D**W
Top marks
Love this. Pen is a great thickness, grips very well, has a lovely click action and the clip can be squeezed open, which is a great detail feature (great fidget pen!). Carefully and thoughtfully designed. Fantastic value, excellent build quality, superb design. Included gel cartridge is very stable on page, though feels a little harsh due to the very precise and small tip - personally I love this pen for tasks like wireframing, sketching/annotations and other quick stuff, but others may actually prefer this feel for writing. Note that it IS a refillable pen, so you're not stuck with this if you don't like it. Overall, just a really handy, very well-made and eminently pleasant pen at a fantastic price.
Trustpilot
4 days ago
3 days ago