Action is about conflict. Whether with guns, blades, fists, or mysterious powers, these anime feature characters in combat - either to protect themselves or the things or people they value, or simply as a way of life.
In these anime, characters embark on a journey to explore the world or to search for something. These wanderers travel to many places and meet new people, often encountering hardships along the way, or discovering strengths and weaknesses about themselves that are revealed throughout the adventure.
Cyberpunk is a type of science fiction where rapid advancement of technology comes at the cost of neglecting social issues. Common themes include powerful or intelligent computers, vast cyberspace networks that can be jacked into or explored virtually, or human augmentation. Many Cyberpunk anime showcase a society that's evolved into a hyper-efficient Dystopia where human needs are secondary to a smoothly functioning corporate machine.
Fantasy anime take place in a broad range of settings influenced by mythologies, legends, or popular and defining works of the genre such as The Lord of the Rings. They are generally characterized by a low level of technological development, though fantasy stories can just as easily take place in our modern world, or in a Post-apocalyptic society where technology was buried alongside the old world. These anime also tend to feature magic or other extraordinary abilities, strange or mysterious creatures, or humanoid races which coexist with humanity or inhabit their own lands removed from ours.
Magic is the use of gestures, incantations, or rituals to harness some kind of supernatural power. Characters in Magic anime tend to go by titles such as witch, wizard, mage, or sorcerer, and may be occupied with learning to harness these abilities or with finding magical relics or battling against strange entities... or other magic users.
Mecha are self-propelling machines that are modeled after humans; some can change into multiple, non-humanoid formats as well. They're usually controlled by an internal pilot or by remote, but are sometimes sentient beings that move autonomously. A mecha's size ranges from bulky, wearable armor to a massive, towering contraption and beyond. While mecha have a wide range of applications, such as making manual labor easier, they are most commonly portrayed as heavily-armed war machines.
Seinen (青年), translated as "youth", is a demographic aimed at men from late teens to adulthood who understand kanji. Seinen manga rarely include furigana with kanji, and have a wide variety of topics and themes. Seinen is the counterpart of Josei, a demographic aimed at women.