---
product_id: 39309517
title: "Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package]"
brand: "uni-ball"
price: "¥2287"
currency: JPY
in_stock: true
reviews_count: 9
category: "Uni Ball"
url: https://www.desertcart.jp/products/39309517-uni-ball-signo-standard-gel-ink-ballpoint-pen-um-100
store_origin: JP
region: Japan
---

# Pack of 6 0.5mm fine point Japan import Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package]

**Brand:** uni-ball
**Price:** ¥2287
**Availability:** ✅ In Stock

## Summary

> 🖊️ Write Your Legacy with Style!

## Quick Answers

- **What is this?** Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package] by uni-ball
- **How much does it cost?** ¥2287 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/39309517-uni-ball-signo-standard-gel-ink-ballpoint-pen-um-100)

## Best For

- uni-ball enthusiasts

## Why This Product

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

## Key Features

- • **Elevate Your Writing:** Experience the smooth glide of gel ink for effortless note-taking.
- • **Stylish & Functional:** Sleek design in sophisticated blue-black for a professional look.
- • **Quality You Can Trust:** Crafted by Mitsubishi Pencil Co., Ltd., a name synonymous with excellence.
- • **Snap Closure Convenience:** Keep your pen secure and ready for action with a reliable snap closure.
- • **Precision at Your Fingertips:** Fine 0.5mm point ensures crisp, clear lines every time.

## Overview

The Uni-Ball Signo Standard Gel Ink Ballpoint Pen UM-100 offers a premium writing experience with its fine 0.5mm point and smooth gel ink. This pack of 6 pens, imported from Japan, features a sleek blue-black design and a convenient snap closure, making it the perfect choice for professionals who value quality and style in their writing instruments.

## Description

desertcart.com: Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package] : Office Products

Review: Good pen, with a very fine line - This is a pretty good pen and I really liked the blue-black ink. However, the 0.38 is VERY fine, too fine for me. If you need an ultra fine line, for whatever reason, this is the way to go.
Review: Already ran out of in from so much writing! - Obsessed with these pens. I love a good a good thin pen and looking for a color that I not the super bright blue. This was amazing. Comfortable to hold, smooth writing.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01N4CN1N2 |
| Additional Features | Pocket Clip |
| Age Range (Description) | teens, adults |
| Age Range Description | teens, adults |
| Best Sellers Rank | #119,766 in Office Products ( See Top 100 in Office Products ) #1,977 in Gel Ink Pens |
| Body Shape | Round |
| Brand | Uni-Ball |
| Brand Name | Uni-Ball |
| Closure Type | Snap |
| Color | Blue Black |
| Customer Reviews | 4.4 out of 5 stars 147 Reviews |
| Drill Point | ball tip |
| Grip Type | Contoured |
| Included Components | Wire Clip |
| Ink Base | Water |
| Ink Color | Blue,Black |
| Item Dimensions | 5.85 x 0.39 x 2.73 inches |
| Item Weight | 2.56 ounces |
| Line Size | 0.5 millimeters |
| Manufacturer | Mitsubishi Pencil Co., Ltd. |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | SG_B01N4CN1N2_US |
| Recommended Uses For Product | Writing |
| Style | Refillable |
| Unit Count | 6 Count |
| Writing Instrument Form | Ballpoint Pen |
| Writing Technique | gel ink |

## Product Details

- **Age Range (Description):** teens, adults
- **Brand:** Uni-Ball
- **Color:** Blue Black
- **Ink Color:** Blue,Black
- **Writing Instrument Form:** Ballpoint Pen

## Images

![Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package] - Image 1](https://m.media-amazon.com/images/I/81wB5iWHSdL.jpg)
![Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package] - Image 2](https://m.media-amazon.com/images/I/81J1+UL+TpL.jpg)

## Questions & Answers

**Q: What color is the ink?**
A: Blue-Black

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good pen, with a very fine line
*by S***D on August 29, 2026*

This is a pretty good pen and I really liked the blue-black ink. However, the 0.38 is VERY fine, too fine for me. If you need an ultra fine line, for whatever reason, this is the way to go.

### ⭐⭐⭐⭐⭐ Already ran out of in from so much writing!
*by L***S on October 4, 2026*

Obsessed with these pens. I love a good a good thin pen and looking for a color that I not the super bright blue. This was amazing. Comfortable to hold, smooth writing.

### ⭐⭐⭐⭐⭐ I love these pens
*by R***6 on October 8, 2020*

I can't remember when I first came across Uni-Ball Signo pens from Japan, but I absolutely LOVE them. Of all the hundreds of pens I have (yes, I have a problem - they're my addiction), I prefer the ones with micro points and these pens have some of the best. They write very smoothly without a skip or leaving a glop of ink like some cheap rollerball points can do. Even if you tend to have very small, cramped handwriting, these pens are so fine that what you write is still easy to read. Ink dries quickly so there are no smears, and it doesn't seep through to the other side of the paper. This blue-black ink is equivalent to a dark navy, and this pen also comes in other lovely colors that are a nice change from the usual bright red, blue, or black. Being such fine point, these pens aren't the best for use on multiple part carbon(less) forms as if you press hard to make sure the imprint goes all the way through, you can tear the top sheet of paper with the minute-point of the pen.

## Frequently Bought Together

- Uni-ball Signo Standard Gel Ink Ballpoint Pen UM-100 (UM100.64), Blue Black, 0.5mm, 6 pens per Pack (Japan Import) [Komainu-Dou Original Package]
- Uni-ball Signo UM-100 Gel Ink Pen - 0.5 mm -10 Pcs (Black)
- Uni-ball Signo UM-100 0.5mm Gel Ink Rollerball Pen, Red (10 pcs Box)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-24*