A practical book featuring 63 tongue twisters to help prevent dementia and improve articulation. - Title: Tongue Twisters That Work for the Brain - Authors: Ryuta Kawashima, Kenta Otani - Price: 1400 yen - ISBN: 978-4-7631-4141-5 - Themes: Dementia prevention, memory improvement, articulation improvement Thank you for looking. I have read it once, but the condition is like new. Instant purchase is welcome. Thank you.