It’s difficult to care for a white obi.
The kanji and the word are exactly the same. That means they share meanings as well. Just keep in mind that this is the type of belt you use for kimono and yukata (traditional Japanese clothes) and not the kind you use to hold up your blue jeans.
What is the first letter in belt? Hmm, I can't remember. OH! "B" (おび)! I remember now.