Simplify the following text for a Grade 13 native English-speaking person.
Original: Native to cold temperate coastal areas of Japan , Korea and China , in recent decades it has become established in New Zealand , the United States , France , Great Britain , Spain , Italy , Argentina and Australia .
Simplified: Native to cold temperate coastal areas of Japan , Korea and China , in recent decades it has also established in France , Britain , Spain , Italy , Argentina and Australia .