9 weeks or 63 days from conception.
My akita had his ears straight as early as 8 weeks AFTER being with me for about 2-3 weeks after he was given to me his ears fell but took him like a week to erect them again so if they fall down dont get scared or anything.
Try Ichiban Akitas in California or NorthLand Akitas in California.
This will vary based on the size of the puppy. Smaller puppies will raise their ears sooner than those that are larger and carry more bone mass in their legs. Once the ears do come up you can expect them to relax as the puppy goes throw teething. An additive to their kibble of plain powdered geletin (kind at the grocery for womens finger nails and cuticles) will also help during this time.