B.

Kyo-No-Oto Ink Keshimurasaki fountain pen ink is a beautiful shadowy and smoky purple fountain pen ink from Kyoto, Japan.

'Keshi' means offset and 'Murasaki' means purple. Keshimurasaki was typically used for formal kimono dresses during the Heian era (the 8th to 12th centuries) when Kyoto was the capital of Japan.

Kyo-No-Oto fountain pen ink is water-based.