わざ
skill
What the hand has learned to do without being shown twice. His judo one is the best in the country, and he brings it out わざと on purpose every time: わざ.
技術 ぎじゅつ is technology, or technique in general, and 腕 うで is the arm and also does skill, the way English says a good hand. 技 わざ is one particular move.
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Emaki is not affiliated with, or endorsed by, Kaishi 1.5k or its authors. The word, reading and meaning come from the Kaishi 1.5k deck, used with their permission. The mnemonic, the note and the kanji breakdown are original work, published under CC BY-SA 4.0.