When studying a language, at some point you feel the desire to use words or grammar in real life, and you try to practice speaking at a conversation academy or over the phone, but the language doesn't come out of your mouth as much as you expected, and you stutter and time passes. The developer also had such an experience while learning the language, and looked for educational materials to practice writing for smooth conversation. Since there were not as many writing-related educational materials as expected, I thought that Japanese language learners might also have this experience, so I provided Japanese language learners with this experience. We have developed an application to help. I hope this helps many people.