Mitsubishi Pencil UMNSFT05D.6 Gel Ballpoint Pen Uni-Ball One F 0.5 D Green

There's a reason Uni-ball has won awards for their inks. They're so deep and inky, they write so smoothly, and they really stick to whatever paper you're using. They might still smudge with something glossy, but for your standard stationary, there's few better pens to rival these.

The pen feels nicely weighted, and comfortable in my hand. The color is spot on. The default black refills for these pens are nice and dark, and write smoothly.

One of my favorite pens of all time. I bought after viewing the Japanese Stationary Awards and they never disappoint. It’s super smooth, doesn’t smear easily, and the ink doesn’t skip. You do have to wait a moment to highlight afterwards.

My favorite pen! This writes like butter. I want purchase one for every room as I love yo write and always need a pen.

Uniball got this right!! The metal on the tip of the pen provides extra support and the weight of the pen makes it feel solid. The 0.38 bullet point gel writes outstanding! The Uniball One series IS the darkest black pigmented ink I’ve seen in the market and it dries FAST. It does not have a grip, this may make your hand feel tired after writing for a while. I use this for precision writing.

The pen feels good in the hand. Maybe I got a faulty ink cartridge, but none of my Uni-Ball One P pens ever skipped like this one has and does.

By far my favorite pen to use for journaling. (And I'm really picky with pens) I buy the ink refills quite often.

One of my favourite pens. Writes well with no blotching. The ink flows beautifully and you can get refills too!

It's alright, I like the build quality and the look. But the click on the One F is not as satisfying as the click on the One P and you can hear the spring squeak/ping on the One P but it's not too bad.

手にしっくり来て書きやすい、インクのつきも良い。ってところの他に、クリップが壊れづらそう（上を押すと下が開くタイプ）だったので嬉しかったです。

This is hands down the best pen I’ve ever had. It writes incredibly smoothly, never skips, and the ink is a beautiful, rich black – deep and crisp. The fine tip gives great precision, making writing a real pleasure. I loved it so much I bought a second one and stocked up on refills (3 blue and 3 black!). It’s no surprise this pen won an award in a Japanese stationery competition – it truly deserves the praise. Highly recommended for anyone who loves a high-quality writing experience.

I have been using this pen for a few weeks now. I have to write a lot in my job and it has been perfect. I like the feeling of this pen and while it does not glide like a 0.7mm the 0.38mm tip writes well and isn't too scratchy like some others I've used. The ink dries quickly so smudging is minimal.

Arrived fast, exactly what I wanted.