After all he does have the chakra level of a peak chunin a step away from jounin level not really surprising because of his talent he experienced a metamorphosis from advanced chakra exercises even thought to grow his chakra so fast in just a year and a half sience graduation.
Of course don't compare his chakra levels with mine which is almost high jounin I have been training chakra sience I was 2 years old and I even had higher that average chakra at birth.
The higher the chakra level gets the harder it gets to train it, I think his speed will slow down expenoncialy when he goes to jounin level and it will be Turtle speed when you get the chakra to the level of kage.
There is also the problem of chakra limit, everyone has a chakra limit. It is how much their chakra can grow. Of course there are some methods to extend that limit. I still haven't reached my limit so I don't have worry about it yet.
But anyways you can't really base chakra level to strength with njinja like Minato I bet he is alredy at a minimum of low jounin in strength even though he is only 9 years old.
By the way he really is m.a.t.u.r.e for his age with his actions and ethic. Not the kind of m.a.t.u.r.e I have, but the kind of m.a.t.u.r.e natural geniuses have.
Then as I am walking I go to ichiraku ramen and I see Kushina already there I am 5 minutes earlier than the set time I don't really want to test the limits of her nerves by being late, then I sit down and tell her.
Me:" Hi Kushina. How are you doing?"
Kushina:" Hi and what's up with that generic question."
Me:*sigh*" I am kind of bored soo.... do we have to wait for Minato or can we start."
She then puts her head on the table and says.
Kushina:" Well we can't really start but you can show me how much you know about seals."
I make an embarrassed face and tell her.
Me:" I am not really that good at it I just want to learn it... I only know some firework seals."
Kushina just looks at me and then covers her mouth trying to stop the laughter and says.
Kushina:"...pft....ha....hahahhahahah
You want to learn fuijutsu like that."
After some laughter about 1 minute of it Kushina looks at my face which is completely serious and kind of angry. I am not really angry after all she is just a kid so I am just acting. Then I tell her.
Me:" I have been learning Fuijutsu for only a short time I am just interested in it."
She looks at me and smiles and says.
Kushina:" No need to be so angry.. "
She thet pulls out a scroll and summons something out of it. Its a book she gives it to me and I read the title and it says
'Uzumaki Beginner Fuijutsu' I immediately start reading it and its amazing it has all kinds of seals in it. It has from the Finger Carving seal which Jiraya used to draw the code on the back of the toad, when he died, this is the introduction to fuijutsu in this book. And at the end of the book is the Three Barrier Seal which is Similar to the Five Seal Barrier technique, instead the user places three sealing tags around their location. If any one manages to enter through a secret entrance of the protected hideout, a deep mist is created and the only way to get rid of it is remove the tags around the protected area.
This is so good, this is a gold mine.
If I am able to learn all the Fuijutsu Kushina is able to teach me I will become one of the best Fuijutsu masters in konoha or possibly the 5 nations when canon starts after all the Uzumaki at that time are almost all exterminated and almost all their knowledge is lost.
In the beginner fuijutsu in konoha library they taught Firework Seal as an introduction to Fuijutsu and the Small Explosion Seal at the end which its not really good against ninja because of its long fuse time and small explosion.
This Uzumaki book introduces the normal explosive seals that ninjas use on the battlefield in the beginner version I can't wait about the advanced version. Finally something new and exiting.
Anyway as I am reading this book I sense Minato coming towards us and I then look towards him, and say to him hello and then Kushina starts explaining and teaching him the Intermediate book that they have started to learn and Kushina explains him while eating ramen, that I and Minato bought her.
Two hours later we finish our studying I even learned the Finger Carving seal to use in 1 finger.
Them as we get up I put the Uzumaki book in my scroll and I tell Kushina.
Me:" Hey Kushina wanna be our referee me and Minato are going to have a spar."
She seems a little conflicted but she said.
Kushina:" Ok sure."
Then we start walking towards the training ground and as we arrive there Minato and I stay opposite of each other about 20 meters (65"7'), I give my ninken to Kushina then she says because I am not going to show them everything I know.
Kushina:" BEGIN."