Ichigo is a native Japanese word meaning 'strawberry'. In Chinese characters it is written , but this character is not in the Joyoo Kanji. This means that the most favoured form should be ichigo in hiragana (). Katakana is also a possible form as there is a custom of writing names of plants and animals in katakana.
Hiragana is the form used below in a menu in a 'family restaurant':
A Google search in August 2003 found the following distribution of spellings on the Internet: