Software
R packages published on GitHub, plus web apps that run entirely in your browser — no installation required.
R packages
HTML apps
All run without installation. Your data is processed in the browser and never uploaded. Each app has its own Japanese/English toggle.
Text analysis (Document-Feature Matrix)
Tokenize Japanese text and build a document-feature matrix (DFM). Detect collocations, remove or replace words, and export to CSV.
DFM visualization (word cloud & co-occurrence network)
Draw a word cloud and a co-occurrence network from a DFM. Adjust thresholds and community-detection methods interactively.
Correspondence analysis
Apply correspondence analysis to an attribute × word crosstab and draw a biplot placing categories and words on the same plane.
Non-negative Matrix Factorization (NMF · Topic model)
Run NMF and view the results in two tabs: a topic model (topic composition by group) and matrix factorization (heatmaps & clustering).
Classification tree (CART)
Build a CART classification tree and view decision rules, a confusion matrix, and variable importance.
Web apps
Apps that run on an external server (R Shiny).
Regression & Classification Tree (CART)
An R Shiny app that builds regression and classification trees (CART).