Tricky pronunciation points for native Japanese speakers!

Are “their,” “there,” and “they’re” pronounced the same or differently?

Can you pronounce “F” and H” correctly? Send me a voice recording of the sentences below, and I will give you feedback!

Can you pronounce “B” and “V” correctly? Send me a voice recording of the words below, and I will give you feedback!

Is pronouncing words with katakana “correct” English pronunciation?

How can I improve my pronunciation to sound like a Native American English speaker?