Iroshizuku Ink Cartridges - Tsuki-Yo

Iroshizuku Ink Cartridges - Tsuki-YoPilot Iroshizuku Tsuki yo ink cartridges bring the collections celebrated twilight blue to the convenience of a cartridge format. Inspired by a moonlit night sky, this deep blue with subtle teal undertones offers excellent readability with a touch of atmospheric character. Color & Character Tsuki yo sits confidently between blue and blue black, showing gentle shading on quality paper without overpowering the page. The dye based formula is balanced for

Pilot Iroshizuku Tsuki-yo ink cartridges bring the collection’s celebrated twilight blue to the convenience of a cartridge format. Inspired by a moonlit night sky, this deep blue with subtle teal undertones offers excellent readability with a touch of atmospheric character.

Color & Character

Tsuki-yo sits confidently between blue and blue-black, showing gentle shading on quality paper without overpowering the page. The dye-based formula is balanced for everyday notes and longer journaling sessions alike, delivering clean lines and a refined, quietly expressive hue.

Ease & Compatibility

Pre-filled cartridges keep your favorite Iroshizuku color ready to travel. The flow is smooth and reliable, making starts and stops easy, while cleanup remains straightforward. These cartridges fit Pilot and Namiki fountain pens designed for Pilot’s proprietary cartridge system, including popular models such as Metropolitan, Kakuno, Prera, Custom series, and Vanishing Point.

Technical Specifications

• Color: Tsuki-yo (deep blue with subtle teal undertone)
• Ink type: Dye-based (non-waterproof)
• Cartridge format: Pilot proprietary
• Quantity: 6 cartridges per pack
• Compatibility: Pilot and Namiki cartridge/converter fountain pens
• Made in Japan