It is named for its inventor, Masayoshi Takahashi. Unlike a typical presentation, no picture and no charts are used. Only a few words are printed on each slide—often only one or two short words, using very large characters. To make up for this, a presenter will use many more slides than in a traditional presentation, each slide being shown for a much shorter duration.
Further information 
Once Takahashi, a programmer, had to give a short presentation at a conference (RubyConf) so he first used the method and found it helpful, at least with Japanese. Takahashi never used PowerPoint or similar software, he uses only text in his slides. He started thinking about how to use the best word for each slide as he took the audience through his presentation. The words or phrases resemble Japanese newspaper headlines rather than sentences which must be read.
The slides use plain text in a visual manner, to help the audience quickly read and understand the material. It's said to be helpful with Japanese and other eastern languages which use non-Latin alphabets.
Many presenters in developer conferences use their own variant on Takahashi. Notably, Audrey Tang's stock presentations at Perl and Open Source conferences use this method.
- Living large: "Takahashi Method" uses king-sized text as a visual
- http://takahashi.su/ — XUL application for making Takahashi style presentations, requires Mozilla browser
- http://conway.rutgers.edu/~ccshan/wiki/blog/posts/Takahashi/ — package for making Takahashi-style presentation in Beamer (LaTeX)
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