---
product_id: 215164190
title: "Uni Ball One, Gel Ink 0.38mm Ballpoint Pen, 8 Colors Set (UMNS388C)"
brand: "三菱鉛筆"
price: "¥3143"
currency: JPY
in_stock: true
category: "三菱鉛筆"
url: https://www.desertcart.jp/products/215164190-uni-ball-one-gel-ink-0-38mm-ballpoint-pen-8
store_origin: JP
region: Japan
---

# quick-drying, no bleed 8 vibrant gel ink colors 0.38mm ultra-fine tip Uni Ball One, Gel Ink 0.38mm Ballpoint Pen, 8 Colors Set (UMNS388C)

**Brand:** 三菱鉛筆
**Price:** ¥3143
**Availability:** ✅ In Stock

## Summary

> 🖋️ Elevate your notes with precision and pop — because your ideas deserve to stand out!

## Quick Answers

- **What is this?** Uni Ball One, Gel Ink 0.38mm Ballpoint Pen, 8 Colors Set (UMNS388C) by 三菱鉛筆
- **How much does it cost?** ¥3143 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/215164190-uni-ball-one-gel-ink-0-38mm-ballpoint-pen-8)

## Best For

- 三菱鉛筆 enthusiasts

## Why This Product

- Trusted 三菱鉛筆 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Color Your Creativity:** Set of 8 vivid gel ink colors to brighten your workspace and ideas.
- • **Effortless Grip & Flow:** Smooth writing experience with water-based gel ink that glides seamlessly.
- • **Smudge-Free Confidence:** Innovative quick-drying ink that prevents bleed-through and keeps pages pristine.
- • **Sleek Minimalist Design:** Simple, elegant shaft with a stylish movable oval clip for easy portability.
- • **Precision in Every Stroke:** Ultra-fine 0.38mm tip for crisp, detailed writing and note-taking.

## Overview

The Uni-Ball One Gel Ink Ballpoint Pen set features a newly developed 0.38mm gel ink that delivers vibrant, quick-drying colors without bleed-through. This 8-color set combines precision, smooth writing, and a sleek minimalist design with a movable clip, making it perfect for professionals and creatives who demand sharp, lasting notes.

## Description

Uni New Gel-Ink Ballpoint Pen, "Uni-Ball One" has appeared. Uni-Ball One features a newly developed gel ink and a simple shaft design. The new Uni-Ball One has a deeper black color and a more vibrant color than typical gel inks, and can create impressive notes that will look sharper when you look back later. General quick-drying ink achieves quick-drying by increasing the penetration of the ink into the paper. As a result, ink bleeding or strike-through sometimes occurred. The newly developed "Uni-Ball One Ink" enables the liquid component to quickly penetrate into the paper by changing the ratio of the solid and liquid components in the ink, while allowing the solid color material to remain on the paper. Although it is a quick-drying ink that penetrates the paper quickly, it does not bleed or strike through to prevent the color material from being absorbed into the paper. The shaft design is simple and straight. The color ink uses an off-white axis color that blends into the living space, resulting in a calm impression. The oval-shaped "open wire clip" has a stylish design and is a movable clip that can be easily inserted between notebooks and notebooks.

## Features

- New Uni-Ball One Ink Adopted
- Ballpoint Diameter : 0. 38mm
- 8 Colors Set : Black, Blue, Sky Blue, Green, Orange, Red, Pink, Blue Black

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0851Y8TJL |
| Additional Features | Pocket Clip |
| Age Range Description | Adult | Children | Teens |
| Best Sellers Rank | #4,988 in Office Products ( See Top 100 in Office Products ) #175 in Gel Ink Pens |
| Body Shape | Round |
| Brand Name | 三菱鉛筆 |
| Closure Type | Retractable |
| Color | Set of 8 colors. |
| Customer Reviews | 4.5 4.5 out of 5 stars (3,021) |
| Drill Point | Extra Fine |
| Global Trade Identification Number | 04902778261439 |
| Grip Type | Smooth |
| Hand Orientation | Right |
| Included Components | 8 pens |
| Ink Base | Water |
| Ink Color | Set of 8 colors |
| Item Diameter | 10 Millimeters |
| Item Dimensions | 5.51 x 3.54 x 0.79 inches |
| Item Type Name | Gel Ink Ballpoint Pen |
| Item Weight | 0.36 g |
| Line Size | 0.38 millimeter |
| Manufacturer | Uni |
| Material Type | Plastic |
| Model Name | uni-ball one |
| Model Number | UMNS388C |
| Style | Set of 8 colors |
| Unit Count | 8.0 Count |
| Writing Instrument Form | Ballpoint Pen |
| Writing Technique | ballpoint |

## Product Details

- **Age Range (Description):** Adult | Children | Teens
- **Brand:** 三菱鉛筆
- **Color:** Set of 8 colors.
- **Ink Color:** Set of 8 colors
- **Writing Instrument Form:** Ballpoint Pen

## Images

![Uni Ball One, Gel Ink 0.38mm Ballpoint Pen, 8 Colors Set (UMNS388C) - Image 1](https://m.media-amazon.com/images/I/61LcLR97TxL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: do you also sell ink refills for these pens? I'm looking for blue**
A: These pens do not write well at all.

**Q: How do these compare to Tül pens?**
A: Well TUL has a larger ball base than the UNI. I find a thinner base more functional

**Q: Does the ink show up on black paper or is it just for white paper?**
A: Just for white, I have been looking for a milky equivalent. I keep hoping they will make some :) since these are my favorite.

**Q: Is the ink archival and waterproof?**
A: As far as I can tell yes

## Frequently Bought Together

- Uni Ball One, Gel Ink 0.38mm Ballpoint Pen, 8 Colors Set (UMNS388C)
- Uniball Gel Pen 12 Pack, 0.38mm Ultra Micro Black Ink, Smooth Writing Office Supplies
- Mitsubishi Pencil UMNS38FC8C Gel Ballpoint Pen Uni-Ball One 0.38 Fica Color Set of 8 Colors

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**Shop now:** [https://www.desertcart.jp/products/215164190-uni-ball-one-gel-ink-0-38mm-ballpoint-pen-8](https://www.desertcart.jp/products/215164190-uni-ball-one-gel-ink-0-38mm-ballpoint-pen-8)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-04*