Next day, In morning at 7 am, Ikki and Chikako headed for training ground 10, but they didn't know someone is following him. After reaching the location, Ikki started with tree climbing exercise. Now because of Chakra flow exercise and Chakra control Screw, His timing has increased around 1 hr. His target is 2 hr before start of new term. Than he can start with water walking training. About Chakra screw, He can rotate screw in clock wise direction. Of course level 1 screw. Chintsu can see finesse in chakra control. He never seen academy student achieve this level. Hell, even he himself doesn't have that level of chakra control at when he was genin. He checked out Chikako's chakra control exercise, past 1 hr he is constantly practicing leaf sticking exercise. He himself never able to achieve more than 45min after 2nd year of training. After looking at this two kids, he got ashamed. But he is also proud of his kid and Ikki who has inspired, actually dragging, Chikako to do this training.
After completing his training of tree climbing exercise, and clock wise rotation of chakra screw, Ikki started to do reverse rotation of screw. After starting he failed miserably. Chinatsu seeing this got scared. He knows, every one has natural rotation in their chakra. And via adding subtle amount of chakra in person's rotation, one put other person in genjutsu. But if this kid has high amount of chakra control, he will never have to worry about low level genjutsu's. Yes, this is one of side effects of having good chakra control. Which Ikki doesn't know yet. Breaking genjutsu requires one to stop their chakra flow or reverse it, via that human body finds out about any external chakra is in system or not. If there is, it removes it. Via having high level chakra control, with which, without even person intervening, body automatically, remove that chakra from system.
Ikki continued this reverse rotation exercise for half hour, after exhausting, he started to review his rekkou training. Seeing this continuous practice of rekko, and Bokuto leaving crater on stump, Chinatu knows, to never let Ikki block any strike with his sword. With standstill, other person won't have any other way to attack, but Ikki, can attack with point blank range. And that's scary in itself.
After 15 min, of practice Ikki decided to start training In Yatagarasou. Yatagarasou, in itself is high speed movement technique, like how Shishui Uchiha used body flicker to create solid clones. This technique is same. Just one physical slash create 8 slashes from all 8 direction. But this is easy saying than achieving. Slash speed should be so high, that it should manifest from all eight direction. Ikki started to practice Yatagarasou, as written in manual. Allen Rodol practiced for 1 billion years, but with that experience he created this techniques. After practicing for 1 hour, Ikki wasn't even able to achieve even 2 slashes out of 1. But he still continued his practice, for another 2 hour. First time till now they completed their training at 1pm instead of 12 pm. Of course, Ikki is reason. Chikako saw Ikki so engrossed in practicing single slash, after calling around 12 times, he gave and slept under shade of tree. After 2 days, Ikki went his apartment to clean it up. And Chikako headed his home. Of course Chinatsu also headed home.
In evening all three people, gathered again in training ground. Next training gave Chinatsu near hard attack. He saw training for Kenbunshoku no Haki. Of course first went Ikki to train Observation haki, when Ikki sat in middle, with blind fold and earplugs, and first ball thrown at him, gave Chinatsu near death scare. He almost blew his cover. But when Ikki dodged most of balls out of 100, of course accuracy is 50%. Chinatsu knew this is kenbunshoku no haki, Ikki and Chikako has talked about before. Because of cat monster, Ikki's Observation haki has broke bottleneck and his level went up to 50%. After seeing Ikki's training in Haki, Chinatsu didn't gave any reaction on training of Chikako. He knew Chikako's level in haki is not that much good yet. This is basically giving oneself dojutsu without eyes.
After Kenbunshoku no Haki, Ikki started his body training and Basic Kenjutsu exercises. Basic give solid foundation. Ikki knew that, and knowing it, He persisted in practicing them every day. Ikki had 2 days break so, his is somewhat vitalized and relaxed. It gave boost in his training. This kind of relaxation is good for health.
After 7 pm, completing his training, Chikako went home. But Chinatsu san stayed as he wanted to see what further training Ikki is doing. He followed up in Ikki's training of trackless steps. Chinatsu doesn't know what is advantages of footwork, in which Ikki is training, but he knows they are not simple. After practicing for 2 hours Ikki headed to his apartment. Chinatsu thinking, Ikki won't be doing anymore training, decided to give up on surveillance. But He is wrong in this part. Ikki is practicing in chakra flow exercise after dinner. In which he is not getting that much progress. But if he did, that would make kenjutsu specialist around the world scared of him. Even veteran Chinin ninjas has difficulty in achieving chakra flow, which Ikki is trying to achieve when he is just entering second year of academy.