Kanji always have at least 2 ways to read. One with hiragana and one with not. For example, sorry i cant type Kanji on my mobile, therer is a ward means big. With hiragana, u would read it as o ki i but if there is no hiragana next to it, u would read it as da i. but there are so many cases that have 2 or more way to read when it does not come with hiragana so you need to check way to read