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