Carry a handkerchief or tissues for drying hands. Avoid blowing your nose in front of people. Elders frown on public expression of affection. If you find customs here different or strange, exhibit understanding and appreciation. Both Eastern and Western cultures developed separately over many centuries.
Many differences remain.
Okinawan family life revolves around the household of the eldest son. Each generation is obligated to all others. Rights of the individual are subordinate to welfare of the group. While the family is basically a male-dominated unit, women hold respected status. The age of the woman will determine level of respect.