Uni-ball Eye UB-150 rollerball pen

The Uni-ball Eye (also known as the UB-150 in many markets) is a globally recognized rollerball pen produced by the Mitsubishi Pencil Company. Originating from Japan, this product is part of a legacy that began in Tokyo in 1887. The 'Eye' series is particularly noted for its 'Uni-flow' system, which ensures continuous ink flow until the last drop.

Today, the brand is owned and managed by the Mitsubishi Pencil Company, Ltd., which remains headquartered in Japan. While the name 'Mitsubishi' is shared with the famous industrial conglomerate, the pencil company is a completely independent entity. The pens are primarily manufactured in Japan, maintaining strict quality control standards for their archival-quality pigment ink.