Sumikko Gurashi Pentel Ballpoint Pen by San-XSumikko Gurashi Pentel Ballpoint Pen by San X. Retractable black ballpoint pen. 0. 5mm. Black Ink. Sumikko Gurashi () is a set of fictional characters produced by the Japanese company San X. The name directly translates to "life in the corner", and all the characters have an affinity for corners, such as the corner seat of a caf or the corner of a room. The characters are anthropomorphised animals and food items, split into Sumikko the main