A traditional home meal is ichiju-sansai: rice, one soup (often miso) and three small dishes. Washoku is on the UNESCO list of intangible cultural heritage.
Slurping hot noodles cools them down and is seen as enjoying your food, not bad manners.
Many families eat toshikoshi soba (“year-crossing noodles”) on 31 December. The long noodles stand for a long life.
Seigaiha, the overlapping “blue sea waves” pattern, is a traditional sign of calm and good fortune.