[1] It is a key component of kaiseki cuisine and reflects the aesthetic and nutritional principles of Japanese meals.

[1] Though the formal ichijū-sansai style declined after the Meiji period, its simpler forms, particularly ichijū-nisai, helped shape modern Japanese dining norms.

The tradition found renewed relevance among the general populace during special occasions and rituals, influencing everyday meal structures and contributing to the contemporary image of washoku (Japanese cuisine).

[4] The arrangement of the dishes also plays a crucial role, with optimal proportions favoring a pleasing visual balance.

The ichijū-sansai meal pattern is believed to contribute to health improvements, although there are concerns about excessive fat and salt intake.