激戦区
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せ
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Meanings
1
closely contested constituency; highly competitive marketplace; battleground
Used for electoral districts with fierce competition, markets with many rivals, or any area of intense rivalry. The figurative sense 'battleground' is common.
This electoral district becomes a closely contested constituency between the ruling and opposition parties every time.
New ramen shops are opening one after another in front of the station, making it a highly competitive marketplace.