This is the 605th most frequent Japanese word.
産業
Industry.
In this sentence, "産業" is used to define a specific field of industry, namely the automobile industry.
日本は自動車産業が盛んです。
Japan has a thriving automobile industry.
Here, "産業" indicates a category of business activities focused on tourism.
観光産業は地域経済に重要な役割を果たしています。
The tourism industry plays a vital role in the local economy.
"産業" here refers generally to industrial activities broadly associated with historical periods of significant industrial advancement.