: The concept likely means a kanji learning method where each kanji connects to the next via a shared radical, reading, or meaning. You could recreate this using free tools like:
While many textbooks introduce kanji based on frequency or simple stroke order, this series uses a "radical-based" or "part-based" grouping system. dondon tsunagaru kanji pdf
: Some libraries or academic platforms like Internet Archive or Open Library may offer digital borrowing options for registered users. : The concept likely means a kanji learning
: Characters are organized into logical groups based on shared components (e.g., kanji containing the "woman" radical or "water" radical are taught together). dondon tsunagaru kanji pdf