Artists take on pseudonyms for a multitude of reasons, but in Zach Saginaw’s case, those reasons run deeper than most. Zach records under the name Shigeto. It’s his middle name; it’s also his grandfather’s name, a tribute to the Japanese branch of Zach’s family tree. Shigeto also means “to grow bigger”—appropriate, given Zach’s premature birth-weight of less than a pound. Today, Shigeto stands for Zach’s vividly beautiful electronic music. Beat-driven but given to richly text..