Hello! That sounds like an exciting trip to Okinawa Prefecture in Japan covering Naha, Ishigaki, and Miyakojima. Here are some detailed travel tips for your journey.

Best Time to Visit:
The best time to visit these vibrant locations is from March through June when temperatures are agreeable and activities are in full swing. Alternatively, September to December is also pleasant, albeit a bit cooler.

Route and Accessibility:
You can easily reach Naha via Naha Airport, which is an international airport with flights available from several countries. From Naha, you can take a flight to Ishigaki Island. Miyakojima is also accessible via flights from Naha Airport.

Accommodation and Booking:
A wide variety of accommodations are available in these areas ranging from luxury resorts to budget guesthouses. It's advisable to book your accommodations in advance, especially during peak tourist season. Major travel platforms like Booking.com or Airbnb operate in these areas.

Clothing and Essentials:
Since you're visiting a tropical location, lightweight summer clothing is recommended. Don't forget to pack sunscreen, sunglasses, and a hat to protect yourself from the sun. Bathing suits, snorkeling gear, and a beach towel will come in handy for beach outings.

Health and Safety:
Standard health advice applies, such as staying hydrated and protecting yourself from the sun. Japan is generally a safe country, but it's always a good idea to have travel insurance and be wary of your belongings.

Local Etiquette and Respect:
Japanese culture values respect and politeness. It's customary to bow when greeting, remove shoes when entering someone's home or certain traditional establishments. Tipping is not customary in Japan.