Introduce them to each other in neutral territory, at a friends house or in the park. Take them on a walk together and see how they get along. Once all is going along ok, take them home.

Hopefully your Labrador is obedience trained and reliable with following commands. If not then I would train the Lab before bringing another dog into the house. One untrained dog can be a nuisance. Two untrained dogs will make your life a nightmare. The new pup will lead the older pup into mischief and your stuff will be wrecked.

These breeds are very trainable, they'll eventually get along. Before introducing your new puppy, take away all items your dog might feel protective of. Here are some very helpful topics,

One of the thorniest issues a pet owner may face is introducing another dog or puppy into the family. A dog who has had the house and family to himself may not welcome another dog in his "den," and may resent having to share his family's attention. The initial meeting is important, so you'll need to prepare to improve your chances of success.

Here's how to properly introduce your new Akita puppy to oyur labrador in the house

Dogs are typically more accepting of puppies that don't threaten their status. When possible, let your labrador learn about the puppy ahead of time by introducing the new puppies scent on a sock or handkerchief. Simply stroke the new puppy with the cloth item, then leave the scented item in your house for your Lab to find, sniff, and investigate.

One room of the house should be made temporarily off-limits to your Lab and function as the new puppies home base. That way, your Lab doesn't feel all of his territory has been invaded by the new puppy. Also, when you bring your new puppy home, your Lab should be on a leash for the first nose-to-nose meeting.