Kazu made his competitive reserve debut on Monday in the 2-1 win over Nottingham Forest at Stevenage and Glenn says both he and the player know there is much more to come.
"When you come to a new country it is always difficult to settle in to a new club with new team-mates, management and way of thinking," explained Glenn.
"That is often the case when you move within Europe. When you come from Japan it is completely different and he is going to need some time to settle.
"I was very pleased with what I saw in the reserve game. He knows and I know that there is more to come, but he hasn't played competitive football for some time.
"His fitness needs to be looked at and I want him to feel comfortable. It is important that when he comes into the squad and into the team to play. He needs to be confident and understand the English game.
"He'll only do that by watching, taking things in and getting used to the training methods. He found the reserve game quite quick and it'll be even quicker in the Premiership."
Glenn added the the confidence level of players is all-important when it comes to a first team introduction.
"He needs a bit of time to find his feet and when he does come in I want him to feel that he is ready. I don't want to push him in so quickly that it backfires and he loses his confidence.
"We want him in a confident mood when he comes in, and if he does well then it will stand him in good stead for the next period of time."
Glenn Hoddle declared himself pleased with the early impression made by new signing Kazuyuki Toda, but insists the Japanese international will need time to settle into his new surroundings.