noun
thumb shift
A Japanese keyboard layout where the thumb keys are used to shift between kana rows, designed for efficient Japanese input. Domain-specific computing term.
親指シフトは、日本語入力のためのキー配列の一つです。
Thumb shift is one of the keyboard layouts for Japanese input.
彼は親指シフトを使って素早くタイピングしている。
He is typing quickly using the thumb shift layout.
Compound of 親指 (thumb) and シフト (shift), referring to the use of the thumbs to press shift keys in this keyboard layout. Developed by Fujitsu in the late 1970s.