Traveling in Okinawa in April, you may come upon a large family gathered at a tomb, spreading out lacquered boxes of food and spending the day there.

This is Shīmī (from the Chinese Qingming), Okinawa’s biggest spring rite for ancestors.

The effect on your trip is “traffic”

It is nothing like Obon. Shops do not close en masse; attractions and hotels run as usual.

Where it shows is on the roads.

  • Tomb areas get busy — Okinawan tombs often sit on hillsides along main roads, so nearby streets fill with cars waiting to park
  • It concentrates on weekends — families hold Shīmī on a convenient day within the period, so it clusters on Saturdays and Sundays
  • Supermarkets and delis get crowded — with people buying the boxed food

If you’ll be driving, allow extra travel time on weekends in early-to-mid April.

The timing shifts every year

Shīmī begins at the solar term Seimei (Qingming) and runs about two weeks, to the next term, Kokū.

Because Seimei is set by the sun’s position, on the modern calendar it barely moves — around April 4–5 every year. This is the opposite of Obon, which shifts by nearly a month.

Check the exact dates on the Shīmī event page (Japanese).

Don’t enter the tombs

During Shīmī, Okinawan tombs are places where families gather to spend the day.

The rows of large turtle-back tombs (kamekō-baka) are striking, and you may want a photo. But that is where people are praying and eating.

Don’t enter the tomb grounds, and don’t take photos. View them only from a distance, from the road.

See also Watching Okinawa’s Events.

Why this is a good season

Shīmī season is, as a trip, a very good time to visit Okinawa.

  • Before the rainy season (which usually starts in early May), so the weather tends to be settled
  • Temperatures in the mid-20s °C — not too hot, and warm enough to swim on some days
  • Easier to book lodging than in the summer holidays

The beach season has already opened in March. Many beaches on the main island are open for swimming by April.

One more thing to know

The Shīmī boxed food (usanmi) is packed with fish cake, pork belly, fried tofu, kelp and more.

In this season, supermarkets and delis fill with usanmi ingredients and ready-made boxes. The rite itself is not for watching, but from the look of the shop shelves you can sense the season in Okinawan life.