Japanese (Hiragana): ろうそく 
Rōsoku (ろうそく ): Candle

Candles have been and still are a popular item to incorporate in kinbaku and ties. 

 

Rōsoku tengu (ろうそく 天狗):
Rōsoku (ろうそく ):  Candle
tengu (天狗): A supernatural creature with a red face and long nose.

Sticking a lit candle in your models vagina.

 

Rōsoku zeme (ろうそく責め)
Rōsoku (ろうそく) : Candle
zeme (責め): “torture” 

This is the most common and seen use, dripping candle wax on your models body.

 

See also: Warōsoku, Tengu shibari