Japan · 5 keyboards
The Happy Hacking Keyboard began with one man's frustration. Eiiti Wada, a Japanese computer scientist, was tired of learning a new keyboard every time he got a new computer, so he worked with PFU to build one he could carry from machine to machine. He compared it to a cowboy whose horse dies in the desert. He leaves the horse and takes the saddle. The first HHKB came out in 1996 with membrane switches, and the 2003 Professional moved to Topre electro-capacitive switches, which every Professional since has used. The layout puts Control where Caps Lock usually sits and Esc next to the 1 key, borrowed from Sun's Type 3 keyboard, and blank keycaps were offered from the start because Wada's students liked them. PFU says it had shipped more than 670,000 HHKBs by May 2023. The range now runs from the wired Classic to the Bluetooth Hybrid and the hot-swap Studio.
5 keyboards we cover.

HHKB · Topre
2006
$190–$290 typical ask
81 on eBay

HHKB · Topre
2019
$240–$410 typical ask
52 on eBay

HHKB · Topre
2019
$270–$330 typical ask
26 on eBay

HHKB · Topre
2019
$240–$330 typical ask
128 on eBay

HHKB · Other MX-style switches
2023
$420–$550 typical ask
53 on eBay