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That depends exclusively on you. There's no specific reason for Satoshi not to have Shikai yet other than any you could come up with.
Luckily, the kids can't tell the difference to begin with.
The children's gasps of surprise and admiration make it all worth it to Satoshi. To have one of their own make it into the esteemed ranks of the Shinigami is reason for great pride among them.
"I can't believe you can kill monsters with that thing. You're amazing, Satoshi-nii!"
"Come on, kids, leave him alone a bit. He must be anxious to see his family!
Hey buddy, you've sure grown since the last time I saw you." One of the farmers, a thirty-something man named Tsuna, comes to greet the Shinigami rookie.
"Pretty sure your mom is going to yell at you for being skin and bones, though."