For international students aiming to enter a Japanese university, having English skills can be a great advantage.
Especially if you are considering the following academic paths, your English ability is more likely to be highly evaluated:

　・Applying to national or public universities
　・Using comprehensive selection or recommendation-based entrance exams
　・Majoring in international studies, economics, business, or science-related fields

Therefore, it is recommended to take English proficiency tests such as TOEIC at an early stage and obtain a score that can demonstrate your English ability.

Reference Links
TOEIC：【公式】テスト申込｜TOEIC Listening & Reading Test｜【公式】TOEIC Program｜IIBC
TOEFL：TOEFLテスト 国際基準の英語能力測定試験 | TOEFLテスト日本事務局