Ink Review - Pilot Iroshizuku kosumosu 

Hello, Chrissy here and today I am reviewing Pilot Iroshizuku tsuyu-kusa.

Pilot Iroshizuku tsuyu-kusa is a bright blue ink that translates from Japanese to Asiatic Dayflower. It leans less purple than asa-gao.

Tsuyu-kusa flowed very well through my pens and felt nicely lubricated when writing across the page. Not at all scratchy. I felt it flowed quite wet. I saw some nice shading and you might occasionally see a slight red sheen in a heavy blot on coated papers.

I didn’t notice any skips or hard starts when I put the uncapped pen down to do swab tests, dry times and water resistance. I didn’t see any feathering on the papers I wrote on.

Available in attractive Pilot Iroshizuku 50ml glass bottles from The Writing Desk


  •        Start-up: Immediate.
  •        Nib Dry-out: Not noticed.
  •        Nib Creep : Not seen.
  •        Staining (pen): Not seen after several days - easy clean-up.
  •        Staining (hands): It took two hand washes before my fingers were clean.
  •        Clogging: Not seen.
  •        Water resistance: Not sold as waterproof and water resistance is low


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