“shore / coast” in Japanese is 岸, read gan, kishi (がん, きし). It is a Grade 3 Kyōiku kanji, taught in year 3 of Japanese elementary school, and appears in words such as 海岸 (seashore).
What does 岸 mean?
川の岸を歩く。
Same sound, different character — the classic trap. Compare them side by side: