Braille reading requires tactile processing, which is not merely a somatosensory activity, but rather a complex verbal activity. It also requires finger movements that are important for understanding the gist of the reading material. For the educational practice of teaching braille reading, research is needed on the legibility and readability of Japanese braille. Four experiments are described in which expert and beginner readers of Japanese braille read various braille materials, including 2-letter combinations, sets of words, pseudo-words, and non-words, and also a simple sentence and a short paragraph. The participants were braille readers who had visual ocular impairments. The results showed the complexity of tactile verbal processing from fast to slow finger movements, each of which facilitates verbal processing in different ways. The findings also suggest that active rhythmic lateral finger movements from left to right, which support whole-sentence reading, should be acquired in order to for an individual to become a proficient reader. The discussion deals with recent issues in the education of people with visual impairments, such as the applicability of the present information to braille readers who have not only visual impairments but also intellectual disabilities, and to braille readers who are dyslexic. Future research should examine the cognitive aspects of braille readers, especially with regard to tactile processing, in order to expand the theoretical basis for teaching braille reading.
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