Was the Game Boy Made in Japan?

Yes. The original Game Boy (1989) was designed, developed, and manufactured in Japan by Nintendo.

Details

• Designer: Gunpei Yokoi (Nintendo R&D1) — also created Game & Watch, Metroid, Kid Icarus.
• CPU: Sharp LR35902 (Z80-derived) — fabricated in Japan.
• Assembly: Nintendo's Uji (Kyoto) and later partner factories in Japan.
• Components: Most ICs, LCD (Sharp), PCB, plastic housing sourced domestically.

Later Revisions

• Game Boy Pocket (1996) — Japan.
• Game Boy Light (1998, Japan only) — Japan.
• Game Boy Color (1998) — Japan.
• Game Boy Advance (2001) — Japan design; some assembly shifted to China/Malaysia for cost.

While modern Nintendo hardware uses global supply chains (Foxconn, etc.), the classic Game Boy line was predominantly Japanese-made.