Here's a data list of how the word "left" (左) is pronounced in a range of Japanese and Ryukyuan varieties. All values are transcribed in the International Phonetics Alphabet (IPA).
Japonic
Proto-Japonic: *pidari
Origin: Native. It's largely believed to originate from 日出り pi+tari "sun+rising".
Japanese
- Tokyo & Kansai: çidaɾi~çidaɺi
- Hachijo (all islands): çidaɾi
- Kagoshima: çidai
Ryukyuan
Amami
- Onotsu & Sakamine: piʑai
- Shitooke & Shiomichi: pidai
- Aden: ɸidai
- Kamikatetsu, Wan, Nakazato & Araki: çidaɾi
- Shodon: çidʲaaɾʲi ~ çidʲaɾ
Okinawa
- Nakijin: pˣid͡ʑei, pˣid͡ʑai, pˣid͡ʑee
- Shuri: çid͡ʑai
Miyako
- Uechi: pɨdal ~ pɨda
- Yonaha: pˢɿ̥daᶻɿ
- Kugai: pzdaz
- Irabu: pʰidiɿ
- Bora: pˢɿdaɿ ~ pˢɿdaᶻɿ
- Kuninaka: pˢɨdaɭ
- Oura: bᶻɿdaɿ
- Shimajiri: bᶻɿdaᶻɿ
- Kurima: pʰïdaɭ ~ psdaz
- Ikema: çidai
- Karimata: bïdaɯ ~ bzdaɯ
- Sunagawa: ps̩daz̩ ~ ps̩daɿ
- Ogami: pɯtɑɯ
Macro-Yaeyama
- Hateruma: pinaɾi
- Hatoma: pidaɾi
- Ishigaki: pɨdaɾɨ
- Yonaguni: n̩dai