Strictly speaking, Barrier Technique was also a type of Sealing Technique!
The difference was that ordinary Sealing Techniques were only used to seal individual targets, and their casting range was limited.
Normally, a single person could perform a Sealing Technique.
Barrier Techniques, on the other hand, were large-scale restrictive ninjutsu. They generally were not used to seal individuals, but mostly for defense.
Therefore, Barrier Techniques were mostly performed jointly by multiple people.
For example, the Four Violet Flames Formation, Four Red Yang Formation, and Six Red Sun Formation.
Of course, nothing was absolute. A Sealing Technique like the Phantom Dragon Nine Seals was simply too inefficient when performed by one person.
And a Barrier Technique like the Uchiha Flame Formation could be performed by Obito alone.
All in all, although the Ninja World classified Sealing Techniques and Barrier Techniques together, there were still some differences between them.
Soji had also developed quite a few Sealing Techniques before this.
Mainly because Ice Release combined with Gentle Fist had truly excellent sealing effects!
Among the Sealing Techniques Soji knew were the Ice Seal, Two Forms Sealing, Yin-Yang Two Forms, even the Gentle Fist secret art—Eight Trigrams Palm: Return to One—and Sage Art - Life Force Preservation.
Besides that, Ice Release ninjutsu naturally came with sealing effects.
After all, if someone was frozen directly into an ice sculpture, did that not count as a Sealing Technique?
As for the Gentle Fist's chakra point strikes, they likewise had the effect of sealing an opponent's Chakra.
Thus, of Soji's three Kekkei Genkai, two were extremely well suited for developing Sealing Techniques.
Soji himself understood this as well.
Therefore, while the number of Sealing Techniques he had developed was not particularly large, it was definitely not small either!
They could handle almost every kind of situation.