na-adjective
Used as a na-adjective to describe something involving specialized knowledge, technology, or technique. Common in compound terms like テクニカルサポート.
このマニュアルはとてもテクニカルで、初心者には難しい。
This manual is very technical and difficult for beginners.
テクニカルな問題が発生した
A technical problem occurred, so I consulted an expert.