• Advice in Japanese

IELTS（アイエルツ）公式テストセンターでの受験 | IELTS（アイエルツ）

• /r/ sound:

https://www.youtube.com/watch?v=82aDf14oOF8

• /r/ and /l/ sounds:

Why do Japanese mix up "L" and "R"?

• Rhythm/stress:

English Pronunciation for Japanese. Rhythm!

• 10 common errors:

Japanese Speakers' English Pronunciation Errors

• 8 week course (free, self-study)

English Pronunciation for Japanese Speakers: Free Online Training