Takehisa Okumura A.K.A. Tak, also known as Aquariust, is a Japanese pipe artist whose glasswork is truly exceptional. Tak is one of the most accomplished glassworkers to have come out of Japan, and they have a LOT of them! He follows the Japanese tradition of packing a ton of detail into little glass pieces, and his extraordinarily intricate pendants are no exception. If you don’t own any Aquariust glass, you can’t call yourself a true heady glass collector.