Contrary to Shisho (described later), being called Gokai, Rokudo is also referred to as Meikai.

Shisho means the four worlds added to Rokudo in the Tendai sect.

In addition, there is controversy as to whether the description in the Lotus Sutra means Buddhahood after changing into a man or Buddhahood just as a woman who she is, and whether the dragon should be regarded as the dragon god classified in Tenbu (deities who resides in the heavenly realm, one of six realms in which the souls of living beings transmigrate from one to another), in terms of Rokudo (six realms of reincarnation) or Jikkai (ten spiritual realms), or as an animal inferior to human beings.

The number of dumplings is different by regions and one theory has it as six, coming from Roku Jizo (six Jizo) and Rokudo (six posthumous worlds) and another as 13 coming from Jusanbutsu (Thirteen Buddha), etc.

Juo were awed and feared; they were believed to send the dead to the hell (Buddhism) or the wheel of life of Rokudo (Six Realms of Reincarnation) in view of the amount of bad things each dead creature did during his or her lifetime.

However, when the judgment cannot be made after the seventh trial, the dead must go to one of Rokudo (Six Realms of Reincarnation); in fact, the additional trials are real bail-outs.

With a combative character, it was added between human and chikusho (Buddhist realm of beasts) of Goshu in the Mahayana Buddhism period and became the master of Ashura-do, Asura realm (path of bellicose demons) which was one of Rokudo (six posthumous worlds).

Though it is not recognized in the theory of Goshu (Five Realms), in the theory of Rokudo it refers to the world in which people with fighting spirit at any time live in such mental condition, or refers to such a mental condition.

In the Middle Ages there was the realm of Tengu other than the six realms of Buddhism, which was assumed and interpreted as Avici for those who were not going to fall into Hell because they had learned Buddhism but were not going to Heaven either because they had done wrong.

In medieval times, Taka-gari started to be practiced among warriors and we can see how it was done in the Kamakura Period from descriptions on the Ippenshonin-eden picture scroll, Rokudo-e (painting of the six realms) of Shoju-raigo-ji Temple, Azuma-kagami (history book) and Soga-monogatari military epic.

In this period, Raigo-zu (painting of Descent of Amitabha Tathagata) and sosyoku-kyo (copying of a sutra with decorative ryoshi-paper) were created following the previous period, but we see the advent of new genres such as Rokudo-e (paintings of the six realms) in the context of philosophy of the six realms, Juo-zo (the statue of Juo) depicting the dead realm's king who judges the dead, and suijakuga which are paintings based on the theories of Buddhist/Shinto unity, and the contents of Buddhist paintings became diverse.

Rokudo-e (painting of the six realms)(Shiga Shoju-raigo-ji Temple)

It is one of rokudo (six posthumous worlds), the world where gods and tennin (heavenly beings) live.

After being defeated by Yoshitsune, the scene where TAIRA no Tomomori describes the battle by comparing Rokudo (six posthumous worlds) as 'being thirsty and wanting water in the ocean is exactly what Gakido (the Buddhist hell of starvation) is' clearly shows the nature of the Heike Monogatari (The tale of the Heike) which is featured by the strong influence by Buddhist thought.

The Cloistered Emperor said, "You must have seen Rokudo. (the six lower worlds)

This area was located at the entrance for visiting Toribeno which was a place for the Kyoto residents to be buried, from central Kyoto and, therefore, this area had many temples such as the Rokudochinno-ji (Rokudochinko-ji) Temple constructed therein and was a prosperous place of belief.

According to Buddhism, human beings repeat their lives after death, in Rokudo (six posthumous worlds); heaven (Buddhism), Ningenkai (human world), Ashura, chikusho (Buddhist realm of beasts), or preta, hell.

Myoho hakase (Professors of Law) were sent to the six main roads, except for Saikaido, in order to give lectures about the new code.

There is an inscription in the lower part of pedestal of Maitreya statue in Seiryuzan Yachu-ji Temple: 'On April of 666, the Emperor Chugu became ill and monks and 118 followers of Kashiwa-dera Temple made this Maitreya statue to pray for his health as well as happiness of all people.'

Accompanying the history of the candy, it is said that the ghost's child became a priest of Rokudochinno-ji Temple and passed away at the age of 68 in 1666.