industry first; first in the industry
Used as a noun-modifying phrase to describe something that is the first of its kind in a particular industry. Often appears in news headlines and product announcements.
This technology is the first attempt of its kind in the industry.
We launched the industry's first service.
日本初 means 'Japan's first', while 業界初 refers to an industry-wide first, not limited by country.
Compound of 業界 (industry) and 初 (first).