Kokuyo - The Biggest Stationery Brand You've Never Heard Of. Kokuyo of Japan have been producing quality stationery products since 1905 and we're thrilled to present this fantastic brand on Cult Pens. We have a carefully-selected range of ingenious products for your delectation and delight. Transforming pencils cases; staple-free stapling; beetle-tip highlighters; weird-shaped but functional erasers and a jolly useful reinforcement ring applicator. One of these products could transform your life! Keep an eye out for more additions from this innovative brand.