Johor Bahru is the state capital of the state of Johor and the second largest metropolitan area in Malaysia. Most tourists don't stop here and just pass through the city on their way to or out of Singapore. JB is a major local transportation hub however. Since it is just across the causeway from Singapore, some travellers use it as a hub to visit Singapore from here (lower accommodation prices) or to board the train, bus or airplane.
Kuching is the capital of the East Malaysian state of Sarawak on Borneo. Kuching is the most populous city in the state of Sarawak and the fourth largest city in Malaysia. Kuching means “cat” in Malay.