KAYOU+ Leron Mono Black

KAYOU+'s first-ever fountain pen.

The nib offers just the right amount of flexibility, allowing you to comfortably express the distinctive strokes of Japanese writing, including the stops, flicks, and sweeping strokes.

The triangular grip naturally guides your fingers into the correct writing position.

A smoky transparent window on the barrel lets you check the remaining ink level at a glance, combining practicality with thoughtful design.

The pen writes smoothly even when held at a relatively upright angle, making it an excellent first fountain pen for those who are accustomed to using mechanical pencils.

Available in F (Fine) nib size only. A dedicated blue-black ink cartridge is included.

KAYOU+

A stationery brand launched in 2025, dedicated to delivering authentic value and enriching everyday life through thoughtfully designed tools.

Products such as AIMVISION PRO and AIMVISION have received major recognition, including the Stationery Shop Award 2026 (Japan) and the iF Design Award 2026, earning acclaim both in Japan and internationally.