Each of these synonyms can also be read as irezumi, a gikun reading of these kanji. Synonyms include bunshin (文身, lit. 'patterning the body'), shisei (刺青, lit. 'piercing with blue'), and gei (黥, lit. 'tattooing').
刺青 真珠 数珠の 龍針 ドラゴンニードルタトゥー)BLOG
In japanese, irezumi literally means 'inserting ink' and can be written in several ways, most commonly as 入れ墨. Tattoos are also sometimes called horimono (彫り物, lit. 'carving') which have a slightly different significance.