1. Amano, N. & Kondo, K. (1999) Lexical properties of Japanese. Vol. 1, Sanseido, Tokyo. (in Japanese)
2. Fujii, A., Yoshida, Y., Jo, K., Okano, Y., Koike, T., & Kumoi, M. (2012) Assessing pupils’ ability to read Hiragana words that are in the curriculum using a test of Hiragana wordchains. Japanese Journal of Special Education Research, 50, 21–30. (in Japanese)
3. Gardner, M. F. (1996) Test of visual-perceptual skills (non-motor), revised manual. Psychological and Educational Publications, Hydesville, CA.
4. Ishii, M., Song, K., Kashihara, A., & Koike, T. (2004) Learning process of writing Kanji in a child with learning difficulty: Study on a case who showed occurrences of interferences in form of Kanji letters. Bulletin of Tokyo Gakugei University, 55, 161–171 (in Japanese)
5. Jacobson, C. (2000) Early prediction of indivisual growth in reading. An Interdisciplinary Journal, 13, 273–296.