The information in this article comes primarily from the doujinshi Omatsuri Zenjitsu no Yoru 21 Seiki-ban 1, but also the novel Jurai as well.  In time, I'll be adding additional information from other materials as translations of those materials become available, including greater details from Jurai.

Because of the length of this article, there are multiple pages, with the other Houses getting their own page.  So to make navigating to the House you are most interested in, I've provided links here:

• Section 2: House Masaki
• Section 3: House Kamiki
• Section 4: House Amaki
• Section 5: House Tatsuki

I'd like to thank everyone who made contributions, especially those who took the time to translate and further enlighten the English-speaking fans.  If you want to help, we can use more translators because there's a lot to bring to light.  Feel free to contact me about this.

His meeting with Tsunami is due to his sister, named Masaki (seen at right). (1)  Apparently, she and her brother got into a disagreement of some kind and she ran away.  While looking for her, he came upon a giant female humanoid who was sleeping.  This female is Tsunami and she had been asleep so long that her extremities had begun to turn into a tree.  Within this man, she detected that from his descendants would emerge the potential of the higher-powered (or at least, a previously unknown) kami -- Tenchi. 

So, Tsunami made her promise to this man, then converted her giant humanoid body into a tree.  That tree is now known as Tenju and is the home of the Royal Palace.  The tree is known as the uterus and in addition to being the foundation of the Royal Palace, it is also where the Royal trees (Tsunami's children) reside.  While not a true Royal tree, Tenju is semi-intelligent.  Indeed years later, a member of House Amaki, Mitsuki, was discovered to have the ability to link with Tenju and know all that went on within the palace.

This image shows Masaki's oniichan (who would become the first Emperor of Jurai) climbing the branches of what turned out to be Tsunami (top left quadrant).  The remaining quadrants show him compared to Tsunami.

Her oniichan launched a search to find his younger sister, but he failed to find her.  He cried over the loss of his younger sister, but mainly because she had managed to foil his plans to push the leadership on her and run away when he had been so desperate to do so. 

Over a long period of time, House Masaki began to decline in status and in population.  This has been attributed to the fact that members of House Masaki weren't all that interested in royal matters.  Further, their members tended to easily get into trouble which would caused large numbers of them to have to resign their royal status.  As such, the other Houses have a love-hate relationship with House Masaki.

This is the setting when Masaki Amane Jurai would meet her future husband Yotsuga Kazuki.  Kazuki was a cadet in Galaxy Police who was stationed on Jurai.  The people of Jurai would challenge new GP members stationed on their planet by staging an event where a girl would be assaulted by a group of drunken men.  The GP officer would be required to rescue the lady from the men.  If he could do this, Jurai would accept the officer.  If not, Jurai would send them back.  This would not be an easy task since the drunken men would in fact be Juraian warriors, whom no normal person could hope to defeat.

Upon arriving on Jurai, Kazuki encountered a group of drunk men assaulting a woman.  However, unknown to all around, these men weren't part of the test, but were real drunks.  So folks watched the brawl between Kazuki and these drunks and did not intervene when he took a beating.  Amane was there with her friends to watch the challenge, but she noticed that something wasn't right in that the drunks were not in the proper place.  Doing a little more investigation, she quickly learned that this in fact was not the scheduled trial, but a real fight.  As such, she stepped in, rescued Kazuki, and sent the drunks packing.

Amane marveled that Kazuki did not use his blaster in the fight.  Kazuki expressed his concern over accidentally hurting bystanders, which caused an amused Amane to say, "Oh, there is no one clumsy enough here to be shot by you."

Because the girl got away, it was decided that Kazuki had passed his test.  Further, Amane decided as an apology for the incident,  to train Kazuki in the Juraian martial arts.  While she was amazed at his foolish behavior, she did admire his determination.  Over time, she fell in love with Kazuki and he with her.

Once Kazuki's tour of duty was over, Amane found she did not want to be parted with him.  To marry Kazuki and remain with him was in conflict with her duties as a member of House Masaki and royalty of Jurai.  As such, she chose to leave House Masaki.  To do this, she was forced to plant her Royal tree into the soil of Jurai, thus cutting it off from Tsunami's power and eventually turning it into a normal tree.  Once this was done, she was free to leave with Kazuki.  However, she would not be allowed to return to Jurai and any offspring she had would not be allowed to return to Jurai as a member of House Masaki without two of the other three Houses agreeing to it. 

After leaving Jurai and marrying Kazuki, Amane gave birth to a son, whom they named Azusa.  It was about this time that the powerful member of House Kamiki, Kamiki Seto Jurai, took an interest in restoring House Masaki, who by this time had virtually no influence.  Things had happened which resulted in House Masaki having no one to lead it.

So when Azusa turned eight, Seto decided to pay her old pupil and friend Amane a visit.  Seto wanted to take Azusa back to Jurai in order to groom him to be the new head of House Masaki.  She had already gotten approval to proceed with her plan by getting House Kamiki, House Amaki (who currently held the throne), and House Tatsuki to agree to allow Azusa to return to Jurai as a member of House Masaki.  Young Azusa wanted nothing to do with Seto or her plans to return him to Jurai, even though his parents had encouraged it.  He didn't want to be parted from his parents and hated the fact that his mother would not be allowed to return.

However, Seto enjoyed a challenge and would not give up.  Amane predicted to Kazuki that Seto would eventually get her way by leading Azusa to say he wants come to Jurai.  For two years, Seto worked on Azusa by visiting him as often as she could, becoming like a 2nd mother to Azusa much to the chagrin of Amane.  By doing this, Seto had worked her way into Azusa's heart without him even realizing it.

It was a full-scale invasion of their colony by a group of pirates that changed everything.  Azusa's parents took command of the defenses of the heavily outnumbered colonist.  The 10-year old Azusa was in the rear of the colony, but additional pirate forces attacked the rear and he was the only one standing in their way.  Amane had trained Azusa in Juraian martial arts, so even though he was only 10-years old, he was no ordinary boy.  He was able to fend off this force of pirates for a time, but eventually was overcome and surrounded.  Azusa showed no fear of the pirates, but did believe that had he only been stronger, he could have overcome this pirate band.

The pirates now had Azusa, but before they could execute him, Seto arrived on the scene. While Azusa attempted to warn her to get away, she showed him what real power was by knocking out several hundred pirates.  Witnessing this awoke Azusa's Juraian blood and as his mother had predicted, Azusa willingly went with Seto to Jurai without Seto having forced him to do so.

For over three years, Azusa trained hard on Jurai under the tutelage of Seto.  While he did not mind the hard training, the cultural studies classes (2) such as tea ceremony, paintings, flower piece arrangement, etiquette, dancing, and more were not to his liking.  He often attempted to run away from Seto rather than attend dance class.  Seto used Azusa's flight from class as additional training, even though he was likely unaware of this at the time.

During one such flight from a cultural class, Azusa got caught in a transporter port, which he assumed was a trap set by Seto.  Instead, he'd been "captured" by one Amaki Mitsuki.  The 13-year old Azusa was captivated by her beauty and after learning that she was in frail health, he spent time with her and a friendship began.  He often returned to visit her, though he did so in secret at her request.  He even allowed her to address him as "Azusa-chan," something that drove him spare when Seto-sama called him that. (3)  During one visit, while observing fog began to cover the area, Mitsuki explained this was a phenomenon was known as "sealing fog" because it ends up hiding the moon.  She then told him an old story about gods, goddesses, and sealing fogs.

The following day, the head of House Amaki, Shuuzan (Shyuzan) was waiting for Azusa in her garden as he attempted to visit Mitsuki.  After belittling her in front of Azusa by revealing her shameful secret (4), Azusa attacked Shuuzan, but was defeated and thrown into prison.  Using the skills he'd learned from Seto, Azusa escaped and made his way back to Mitsuki, where he discovered her meeting with her grandfather, the current emperor of Jurai.  Once the emperor left, Azusa attempted to convince Mitsuki to escape with him and leave Jurai forever.  Before he could convince Mitsuki to attempt such an escape, Seto arrived on the scene and stopped him, easily defeating him in battle. 

Days later, Azusa was summoned before the Supreme Council, where he expected to be punished for the crime of visiting Mitsuki.  However, Shuuzan ended up not pressing charges against him thanks to Seto-sama's intervention.  Instead, Azusa was to undergo the tree selection ceremony, where a Royal tree would partner with him.

On the day of the selection, Azusa was brought to the arboretum, and was joined by the Emperor, Seto-sama, Tatsuki Kotono Jurai (leader of House Tasuki), and Mitsuki who were to witness Azusa being chosen.  Azusa made his way to the transporter that would carry him to the level where the 2nd-generation trees resided.  If the transporter failed to activate, he would be chosen by a 3rd-gen tree.  The transporter activated, and the group followed Azusa to the 2nd-gen tree level.  Each 2nd-gen tree greeted Azusa, but none selected him as a partner, much to the confusion of those with him.  However, it was then that they realized that he was to be chosen by a 1st-gen Royal tree.  Only three people in the history of Jurai had been chosen by 1st-gen trees.

Mitsuki lead him to the next transporter, where the two were taken to the realm where the 1st-generation trees resided.  She lead him down a pass to one of the 1st-gen trees, where she revealed that this was in fact her tree.  (5)  She asked Azusa to name the tree, and told him that when he heard her voice, he was in fact hearing the voice of the tree.  She revealed many facts to Azusa.  One was that his uncle, Amane's brother, took the responsibility for crimes that Mitsuki had committed. Because of that, Jurai would not allow Amane to return once she'd resigned from House Masaki.  Finally, she revealed  the shocking truth that the power from the five 1st-generation Royal trees were the only thing keeping her alive and that her right eye was in fact made from the sap of the Royal tree, making it that tree's key.

In the end, Azusa promised Mitsuki to take her anywhere away from Jurai as she died.  He placed her body in an uro of the Royal tree (a hole in the tree, much like what Sasami-chan and Tenchi entered in episode 2 on board Ryu-oh) that contained a crystal pond of sap.  Here, Mitsuki was encased and preserved forever and Azusa then named his Royal tree Kirito (Sealing Fog).

By being selected by a 1st-gen Royal tree, Azusa was immediately the leading candidate to replace the current emperor upon his death.  This also meant that the previously weak House Masaki was now well on its way back to power and influence on Jurai.

As a young adult, Azusa took Kiriko, now housed in a core container and residing within a tree-ship, his "droid" guardian Jiji, and set out on "warriors striving journey."  Even then, Seto-sama continued to work on him.  Having arranged for Azusa to marry her young (and still very underaged) daughter Misaki, Seto wanted to ensure that Azusa didn't have thoughts of other women.  Further, since Jurai was founded by pirates, the natural tendency was to not be locked down by their duties, but to run free, much as Masaki had done at the founding of Jurai (and something her brother would have done if he could).  So Seto arranged for several fake attacks to happen along his journey where beautiful women would always be the "victim."  This annoyed Azusa greatly.

However, one distress call turned out to be very real.  A very powerful pirate ship, the Souja, has attacked a transport fleet, but has only targeted two ships in the fleet, indicating that these pirates weren't just out to loot ships, but were after something specific.  Azusa challenges the pirate ship, and to his surprise, the ship responds by changing course to him rather than run away.  (6)  Rather than destroy the Souja, Azusa decides he wants to meet the pirate in charge.  With his Master Key (an energy sword), Azusa and Jiji board the Souja and engage in battle with 200 guard robots. 

Eventually, the dual make their way to a great hall where a man sits playing neole (the instrument that looks like a pipe-organ, as seen in episode 6).  The man is Kagato and he defends his actions as justified in the quest for knowledge.  The two soon engage in battle and things do not go well for Azusa.  Being prideful, Azusa does not draw on the power of Kirito to fight Kagato and he pays for it.  Kirito, sensing the danger Azusa is in, opens a portal within Souja and with that, he and Jiji flee.  The battle between Souja and Kirito begins and Kirito is able to defend against Souja's incredible power with her Light Hawk Wings, and is able to counter attack by slicing the Souja with one of her three LHW blades.

At this point, a new ship arrives on the scene, the pirate ship Ryo-ohki, captained by pirate Ryoko.  With her arrival into the battle, things change.  Ryo-ohki's attacks are able to overcome Kirito's LHW's, something that should not happen short of a warship the size of a planet doing the attacking.  The resulting battle causes a dimensional tear in space

(2) These cultural lessons are in fact Japanese cultural items.

(3) The meaning of honorifics is shown here.

(4) The full story of Mitsuki will be told later and a link provided.

(5) As far as we know, Mitsuki was never officially partnered with this tree, but the partnership was very real nevertheless.

(6) As seen in GXP, a 2nd-generation tree-ship is powerful enough to cause pirates great terror, so a 1st-generation tree-ship should have anyone it challenges fleeing on the spot.