How to convert text in a column into a list

[cloa513ch]

For example In Column A
Row1 a
Row 2 b
Row 3 c
(The converted value) row 4 a,b,c,

Some of the text is currently in Japanese.

[JohnSUN]

Maybe TEXTJOIN() function? Like as =TEXTJOIN(",";1;A1:A3)