Ninjutsu
Minato was taught by Jiraiya how to summon toads, and was one of the few people to earn the respect and full cooperation of Gamabunta. He had skill with barrier ninjutsu. Minato was also an adept sensor, able to detect chakra signatures from great distances. For closer targets, he could detect everyone within an area by placing his finger on the ground. Minato was also proficient in the nature transformations of Fire, Wind, Lightning, along with Yin and Yang Release.
Rasengan
Minato forming the Rasengan.
After observing the nature of the Tailed Beast Ball, Minato spent three years developing one of his signature techniques, the Rasengan — the highest level of shape transformation. It gives him an edge in combat due to requiring no hand seals to create and being self-sustaining. While it demands very precise chakra control to use, Minato's mastery allowed him to form it with either hand instantly and vary its size from standard to Big Ball Rasengan-sized, and when using Tailed Beast Mode along side Naruto who is also using Tailed Beast Mode, they can together make a Rasengan even as large as Tailed Beast Mode.
Space–Time Ninjutsu
Minato's Space-Time Barrier.
Minato's other signature ability was the Flying Thunder God Technique, which he gained greater mastery and versatility than its creator, the Second Hokage. His exploits with this technique gained him the moniker "Konoha's Yellow Flash". Using the technique, he could instantly move to the location of anything marked with his special seal, whether a tool, place, or person that was branded. Minato could bring others with him, though he needed to provide the chakra for their transport. He did not need to accompany targets he teleported, giving him a defensive option to teleport incoming projectiles away. He also had skill in teaching others Space–Time Ninjutsu, having taught the Hokage Guard Platoon the Flying Thunder Formation Technique.
Shurikenjutsu
Minato's special kunai.
Minato had his own special brand of kunai for combat; triple-prong kunai for better offensive potential. He would throw them at opponents or wield them as melee tools, even in his mouth. Their main use came from the Flying Thunder God seals they were marked with, allowing him to teleport to wherever one of the kunai was thrown. He carried a large number of kunai in the field that he would scatter across a wide area so that he could move around with more options. Although his normal tactics with kunai did not require precision, Minato nevertheless had excellent aim and could coordinate his throws' timing and placement to allow him to perform complex Maneuvers
Fūinjutsu
The key to the Nine-Tails' seal.
Minato learned several fūinjutsu from Jiraiya and Kushina. The most notable of these was the Eight Trigrams Sealing Style he used to seal the Nine-Tails' Yang-half into Naruto, which would allow small amounts of the Nine-Tails' chakra to naturally mix with Naruto's own. Knowing the seal would slowly weaken over time, Minato created a key that could accelerate or reverse this process. As an extra precaution, he mixed Kushina's and his own chakra into the seal so that, when certain conditions were met, they could help Naruto with his control of the Nine-Tails' power, as well as allow them to see their son after they were dead.
Minato could also perform the Dead Demon Consuming Seal, which he had enough familiarity with to know it couldn't be used to seal all of the Nine-Tails' chakra. With the Contract Seal, he could remove an opponent's control over any creatures they summoned. He also knew how to immediately transfer a tailed beast from one jinchūriki to another.