Keyboards

tarohayashi Killer Whale

A 28-key, three-dimensional one-handed DIY kit with swappable trackball/D-pad units that becomes a split keyboard when two halves are connected.

Key specs auto-matched against source pages · Last verified: 2026-10-17

tarohayashi Killer Whale
Image: © tarohayashi (Manufacturer image)
~¥13,000

Where to buy

View at BOOTH (Killer Whale 【バラ売り】)Official site

This page contains affiliate links. We may earn a commission at no cost to you.

Pros

  • Built-in trackball, swappable for a D-pad or other units
  • Tilted 3D structure out of the box
  • Hot-swappable MX switches
  • Reversible PCBs; usable as a single-hand device

Cons

  • Requires soldering and a lengthy, involved build
  • One kit covers one half only; two are needed for a split keyboard
  • Switches, keycaps and USB cable not included

Specs

SplitSplit
StaggerColumnar
TentingFixed
KeywellNo
Thumb clusterYes
Keys28
LayoutsCustom
SwitchesMechanical
Hot-swapYes
FirmwareQMK
DIY kitYes
ConnectivityUSB
OSwindows, macos, linux
Released2023
Sources
AD · detail-mid

Similar devices

FILCO Majestouch Xacro M10SPKeyboards

FILCO Majestouch Xacro M10SP

A wired, split 70% keyboard with Cherry MX switches and ten dedicated macro keys along the inner edges, supporting hardware and software macros.

~¥24,200
Logitech ERGO K860Keyboards

Logitech ERGO K860

A wireless full-size ergonomic keyboard whose one-piece curved body splits the two key halves at 25° and raises the center by 12°, with a cushioned wrist rest built in.

~$119.99
Keychron Keychron Q11Keyboards

Keychron Q11

The Keychron Q11 is a wired, all-aluminum split keyboard that keeps a conventional row-staggered 75% layout and adds QMK/VIA support, hot-swap sockets, and two knobs.

~$204.99