Strength: He has a punch that even full demons are not immune too. Knocking them out or on their asses. InuYasha is super strong, able to swing boulders that weigh eleven tons, about two (three) times his size with one hand. He can also punch through solid steel with his bare hands, and toss a mountain sized demon clear into the sky!
Speed: He's fast, plain and simple, easily faster than a horse; or any land or water animal. (Although Sesshoumaru is much faster.) he is able to cross great distances with a single jump. Altogether, this creates the illusion that he is flying every time he leaps. He can reach the top of tall cliffs with a single leap as well. Added in on this, he can also carry two people on his back, Kagome's own little taxi service!
Senses: Super Dog! Seriously his senses aren't super human, they're super canine. Smell, hearing, taste and even able to see well in the dark. Too bad it's also his weakness too. :<
Overall: All in all you have one pretty tough dogboy, he's very durable, even from fatal mortal wounds. He's been impaled through the stomach, (EVERYONE impales him in the gdamn stomach, and thinks they've won, I dunno why!) through the chest. Had his throat slashed and pierced, fallen from great heights, and has healed from these in a matter of days. He's pretty immune to (some demonic with the firerat robe, normal without) fire, and can withstand very hot and cold climates.
[散魂鉄爪] Sankon Tetsusou/Soul Scattering Iron Claw: InuYasha's basic attack, strong enough to rip apart and tear through iron like nothing. So easily enough he can tear through his enemies in sweeps and swipes! It's pretty powerful, leaving gold trails in the path of his claws. Which is a bonus! >D
[飛刃血爪] Hijin Ketsusou/Blades of Blood: Yeah, pretty much he throws his blood at you. So if you wanna make him bleed go ahead! He'll just fling it and the youki will become a sizzling red, as many droplets as there are, is as many that'll cleave you to bits!
[鉄砕牙] Tetsusaiga/Iron Crushing Fang: A tooth. No really, it is! Well it's a dog fang crafted into a dorment and rusted katana. An heirloom from his father. It's true form is that of a massive blade, spanning at the most InuYasha's height, 5'7" inches. Tetsusaiga is a blade that has the ability to desstroy 100 demons in one sweep. It's 'a sword that cuts' Tetsusaiga's strength is an extension of InuYasha's own power. So it's easy to say that InuYasha and his blade are well in sync with one another. The blade also has the ability to gain strength by cutting down powerful demons, gaing an increase in its own youki. Tetsusaiga was designed and grafted to protect InuYasha's life, aswell as teach him the importance of protecting others, the people he cares for. It also acts as a bind to keep his demon blood from taking over. If any full-blooded demons try to wield the blade, Tetsusaiga will reject them, giving them an enormous amount of deadly force. Opposite with Humans, the blade will not transform, but stay in its rusted form. A person who mercilessly slaughters the innocent has no right to wield the Tetsusaiga, it's a weapon to protect the living world.
Kenatsu/Sword Pressure The force of the blade without physically actually touching you! Slices of wind or a gail of it. It can blow down and destroy demons like that too.
[風の傷] Kaze no Kizu/Wound Of The Wind: Found by being able to smell out the two forces of youki scraping against one another,(Tetsusaiga's energies and the opponents.) This is Tetsusaiga's base attack. Once mastered, Inuyasha was able to use the technique anytime he wanted.
[爆流破] Bakuryūha/Explosive Flowing Wave: The opponent has to have a massive amount of demonic energy, it only works on demons of course or opposing youki in general. Tetsusaiga's ultimate attack, combining both energies, and causing that power to back flow right into the enemy. 100xs in strength. WITH EXTREME TORRENTS OF AWESOME!
[赤い刃] Akai Tetsusaiga/The Scarlet Blade: By cutting the ancestral orb of the ogre bats, Tetsusaiga's blade shifts into scarlet, able to cut down most but not all barriers.
[金剛槍波] Kongōsōha/Diamond Spear Wave: Tetsusaiga pulsates, and is covered in fragments of diamonds. When the sword is swung, many shards and spears of diamonds are blasted from the blade. Able to penetrate even the most strongest of barriers.
[竜鱗の鉄砕牙] Ryūrin no Tetsusaiga/Dragon-Scaled Tetsusaiga: Yet another ability to Tetsusaiga (he has a lot okay?!) using this tech, Inuyasha had to train in order to see the youketsu of a demon/youkai. What is a youketsu you ask? WELL.. GLAD YOU DID - Youketsu is pretty much the life force of a youkai (hanyou too) once Tetsusaiga cuts that, it's like an instant kill. Also as such, when Tetsusaiga is in this state it can absorb limitless amounts of youki. Pretty handy, eh?
[冥道残月波] Meidō Zangetsuha/The Path to Hell: The ability to create a path to Hell itself, it was originally a tech which was a sphere, neutered by Sesshoumaru's Tenseiga, but the technique was meant to be absorbed by Tetsusaiga itself.
[斬る冥道] Kiru Mei Dou/Cutting Meidō Tetsusaiga's blade turns completely black. Now InuYasha's own, since Tetsusaiga is a "blade that cuts" instead of the sphere the attack transforms into a barrage of blades themselves, with the same properties as before. Deadlier infact.To put into terms.. FUCKING EPIC. Chances of InuYasha using this on the island though? LOL None!