Hideo Sairaiji established 5 abbreviation rules of Shugiin system in his Basic principle of Shugiin system. He explains as followings;
(1) Simplification means simple and swift.
(2) Abbreviation means omission shorten.
(3) Analogy means grouping and deduce.
(4) Prominent means one stroke conspicuous.
(5) Fluid　means streaming dynamic