Original Ink "Seiran" (Indigo-blue) Shitanachi series, Dye-based InkIndigo blue from the Old town in Tokyo (Shitamachi no Seiran ) Inspired by the deep blue noren curtains that sway at the entrances of traditional downtown shops, Ainonoren is a timeless indigo ink that captures the charm and warmth of old Tokyo. Its rich blue indigo hue shines beautifully on virtually any paper, making every word clear, elegant, and enjoyable to read. Whether you're writing a letter, journaling, or simply jotting down daily notes,