Disclaimer: I did NOT attend any of these events, I'm only translating the interesting reports I read from weibo and twitter. Also, I only have a basic understanding of Japanese and Chinese so my translations may not be very accurate.
Tsuyoshi did not attend this event in person, but participated through a live broadcast from elsewhere to avoid direct exposure to loud noises due to his condition.
Koichi at Backstage
Tsuyoshi: /starts explaining his condition and the treatment he went through the past few weeks/ I'm really sorry...
Koichi: Tsuyoshi really wanted to participate on stage, but was stopped by the doctor after all.
Tsuyoshi: Yeah, doctor stop.
Koichi: There's also ko-chan stop. He referred to himself as ko-chan :D
Koichi: If you were to be unable to perform on stage again in the future because of this, if we were unable to stand on stage as a duo, I would be even more troubled so it's still better for you to rest now! I even discussed with the staff if it was possible to build a soundproof room on stage, but I definitely do not want you to be standing next to me on stage in a situation where there would be any risk to your hearing.
Fans: Eh? Where's Koichi? Why is he not coming on stage?
Tsuyoshi: Oh, that's because he's in my mouth.
Fans: ???
/The screen broadcasting Tsuyoshi is in the middle of the stage. The screen at the position of Tsuyoshi's mouth suddenly moves and Koichi enters the stage/
Koichi: I will say this first, I will not sing Tsuyoshi's part in any song today! I'll leave it up to the fans to sing! Also, I'm sorry that desptie being the only one on stage, I will not stand in the center but on the left side.
Tsuyoshi: But aren't I in the center (since the screen is in the center of the stage)?
/Tsuyoshi proceeds to move to the right side of the camera, making him appear to be towards the right side of the stage/
T/N: The left/right mentioned above (and likely below) are from stage perspective so from the audience perspective it would seem the opposite! But basically, Koichi stands at the side he usually does in KK concerts.
Hey! Minna Genki Kai?
After singing this song, Koichi mentioned that he had wanted to sing "Tsuyoshi Genki Kai". Thus, he sang the song again replacing the lyrics "Minna" with "Tsuyoshi". Tsuyoshi was smiling and looking extremely happy from the live broadcast.
VTR
Both of them were holding a list of their earlier concert footage in the hand. Koichi asked Tsuyoshi which footage he would like to watch. Tsuyoshi said Kishi Michi (Koichi's Solo from 1997 A so Bo Concert). Koichi was unwilling because he found the performance rather silly but Tsuyoshi was insistent on watching it. Koichi finally let the staff play the footage and chose to watch Aishiteru Aishitenai (Tsuyoshi's Solo from 1997 A so Bo Concert).
FRIENDS
Koichi: Which song should I sing next?
Fan: Natsu no Ousama
Koichi: I won't~~ I'll sing FRIENDS instead.
Tsuyoshi: At the original key?
Koichi: It should be?
Ken: Nope, it's a semitone lower.
Koichi: Thank you very much /bows
T/N: Koichi and Tsuyoshi complained on Shounen Club Premium 2016.08.17 that they had refused to sing Natsu no Ousama because the key was too high for them and difficult to sing as a result.
Ame no Melody with Ikuta Toma
Koichi dragged Toma to the right side of the stage. The three of them danced to this song together and Toma kept apologising to Tsuyoshi afterwards. Koichi told Toma that if in the future he was to hold a solo live concert, he would backdance for him.
Happy Happy Greeting with 4U
4U brought a cake with "KinKi Kids 20th Anniversary" written on it to the place Tsuyoshi was broadcasting from. There was another identical cake on stage for Koichi. Both of them blew the candles on the cake together~ 4U wrote a letter to KinKi Kids, but mis-wrote their name as "Kinki Kids" and was scolded by Koichi. When singing, Koichi changed the lyrics from "Omedetou Omedetou Birthday" to "Omedetou Omedetou Twenty Years".
Yamenaide PURE with 4U
Tsuyoshi and 4U danced to this song. However, the room that Tsuyoshi was in was rather small and the five of them were squeezing and pushing each other while dancing.
Hitori Jyanai
Koichi complained that it was too hot wearing this costume (a suit) and asked if he could take it off. He turned away from the audience and changed on stage revealing his beautiful back muscles into a shirt that had a picture of young-Tsuyoshi printed on it. At the same time, Tsuyoshi changed into a shirt revealing his shirtless back-view for a moment that had a picture of young-Koichi printed on it. Koichi faced the screen and asked Tsuyoshi: "I have a song I wanted to sing, could you listen to it?" Tsuyoshi started bouncing excitedly while listening. At the end of the song, Koichi said that the lyrics were especially good because they could convey his feelings.
Demo Song
Koichi: Actually, I started co-writting a song with Dojima Kohei. You probably heard the demo previously?
Tsuyoshi: Yep! I did!
Koichi: You have probably not heard the one with some changed parts, right? I will sing it to you now although there are no lyrics, so I hope you would use your current feelings and gratitude to fill up the lyrics!
Tsuyoshi: Eh? Now?
Koichi: Nope, I just want you to remember the current emotions you're experiencing now. But I believe that this would became a really great song with your lyrics!
Tsuyoshi: Eh... I wasn't able to think of any suitable lyrics for this song during my stay at the hospital but I thought of another good melody! I wish it would became a great song soon so I want you to write the lyrics for this.
Koichi: Umm... Me writing lyrics...
Tsuyoshi: I would write lyrics also!
to Heart
Tsuyoshi picked up a guitar and started strumming to test if Koichi and the fans could hear him. Koichi responded he could hear it very clearly. However, when Tsuyoshi started singing, the guitar could barely be heard and it sounded like an acapella. After Tsuyoshi had finished singing, Koichi told him that he could not hear the guitar but praised Tsuyoshi's singing.
Zenbu Dakishimete with Nagase Tomoya
Koichi: Nagase is the only one who can sing our songs with the both of us.
Tsuyoshi: Yep.
Garasu no Shounen with Nagase Tomoya
Koichi mentioned that Nagase had told him not to sing this song with other people because it's KinKi Kids' song. Koichi asked Nagase if he wanted to sing it today. Nagase was stunned for a moment and Koichi asked Tsuyoshi for permission. Tsuyoshi said that he would dance while the both of them sing. After singing this song, Koichi thanked Nagase for helping. Nagase kissed Koichi on the cheek similar to during the 2007-2008 Johnny's Countdown Live and exclaimed that he finally got to kiss Koichi xD Koichi retorted that people would call them BL again.
Anniversary
Tsuyoshi used this time to draw a picture of the both of them with "Thank You for 20 Years of Love". Koichi kept praising Tsuyoshi's drawing and Tsuyoshi said that he likes Koichi's drawings a lot as well. The screen at the position of the picture moves and Koichi exits the stage.
------------------------------------------------------------------------------------------------------------------------
Opening Talk
/discussing about having held a concert at Yokohama Stadium in the past/
Koichi: I heard that the convenience stores nearby have "Welcome Back, KinKi Kids" pasted around.
Hey! Minna Genki Kai
Koichi replaced the lyrics in the chorus "Minna" with "Tsuyoshi".
/After the song/
Koichi: So, what do you want to do now Tsuyoshi?
Tsuyoshi: Let's watch more of our older footages.
Koichi: Which one?
/Tsuyoshi looking at a list and thinking/
Koichi: Ah! There's a song which I have a special memory of, I want to watch it!
/Staff proceeds to play Bonnie Butterfly from G Concert/
FRIENDS with Shori and Takki
Koichi: Let me be a backdancer for a Sexy Zone concert! And I'll wave my hands a lot.
Fans: Ehhh?
Koichi: I will not wave to you guys DoS Koichi is back xD
Tsuyoshi: Wave to them~
Bara to Taiyou
Koichi: Is the trombone at your location Tsuyoshi?
Tsuyoshi: It's here, it's here
Koichi: You're not allowed to play it! It's not good to your ears. Just pretend to play it.
Tsuyoshi: Buu~ /takes out the trombone and pretends to play it/
Koichi: You're not allowed to play it! Doesn't the interlude have a solo section? The beginning as well.
During the section of the song where Koichi runs his hand along his neck while dancing, Tsuyoshi did the same movement. After the song, Koichi mentioned that he felt like singing this song today and thus requested for the trombone to be sent to where Tsuyoshi was at.
Kanashimi Blue with Ueda and Nakamaru
Koichi told the two of them that the composer of this song is just over there while pointing to Dojima. Ueda and Nakamaru were shocked and turned around to realise that Dojima was sitting just behind the both of them. They went up to shake hands with him.
Toppatsu Love (Demo Song)
Tsuyoshi managed to write a bit of lyrics. He wrote the lyrics from a female's perspective and Koichi questioned if he was actually female xD While Koichi was singing with lyrics, there were fireworks from another event in the sky.
離れた夜空に咲く花
A blooming flower in the distant night sky
故意に落ちた稲妻みたいで
Like a lightning that fell intentionally
ぬめった風も泣いている
Even the moist wind is crying
歌ってるすべてが切ないの
Everything about singing is painful
-
諦めのキスはまだしないよ
Having not given up on the kiss
いつかそっと叶うよと胸は弧を描く
If it secretly comes true, my chest would draw an arc
-
突発LOVE
Sudden LOVE
言葉にない このメロディーも
Not in words, nor this melody as well
聞こえない そのメロディーも
Unable to hear, nor this melody as well
突発LOVE
Sudden LOVE
虹打つ愛のネオンがキレイ
The neon from hitting a rainbow is pretty
会いたいよ
I want to meet you
大好きよ… I love you...
T/N: Song lyrics are extrmely difficult to translate xD If anyone has better suggestions, please let me know and I'll edit this.
Hakka Candy with Masuda and Uchi
Koichi: Yesterday, the staff told me that Uchi would be coming today. So I called him directly and asked if he could visit Tsuyoshi instead. The both of them have barely met before right? Or not at all? It's interesting just thinking about it.
Koichi: Masuda, stand closer to this side. That's Tsuyoshi's position so you cannot stand there!
/After the song/
Koichi: There's so much eye contact when singing with you. Although I rarely make eye contact with Tsuyoshi, we are still able to harmonize perfectly!
Mou Kimi Igai Aisenai
Koichi: Can you sing today?
Tsuyoshi: As long as I'm inside this room, I can!
Koichi: Then let's sing a song.
Tsuyoshi: Which song?
Koichi: Mou Kimi Igai Aisenai
Tsuyoshi: But I have about half a beat lag here...
Koichi: It's okay, it's okay. Even if there's a half a beat of lag, I want to sing this song together because of its lyrics.
/Koichi turns around and faces the screen ignoring the audience while singing/
Aisareru Yori Aishitai with Aiba and Jun
The three of them were looking at a list of unaired footages with Arashi as backdancers. Tsuyoshi pretended to stick his head out as if trying to look at the list. Aiba and Jun realised this and gave way for the camera so Tsuyoshi could look at it through the broadcast as well. When Koichi finally realised Tsuyoshi was sticking his head out looking at the list together with them, he asked what he was doing. Tsuyoshi proceeded to "hide" by moving to the edge of the camera xD
Koichi: Aiba really hasn't changed much.
Aiba: During the recent filming of the SP, looking at the your attire, wearing a cap, I thought that it was exactly the same as the one 20 years ago.
Koichi: HAHAHA My hair style might be similar but the cap is definitely not the same one!
Jun: I remembered borrowing Tsuyoshi's handphone to watch Doraemon.
Aiba: The handphone that Tsuyoshi is using now has many scars.
Tsuyoshi: Eh, really? I didn't see any.
Koichi: Even your eyes now?
/Aiba and Jun getting into position to dance/sing/
Koichi: Stand closer to this side. That's Tsuyoshi's position so you cannot stand there.
Kiss Kara Hajimaru Mystery with Aiba and Jun
Koichi: Thank you Aiba and Jun for coming to support. Let's go and eat together in the future!
Jun: Tsuyoshi told me that he wanted to treat me to a meal because he caused us trouble, so the four of us should go together.
Koichi: Sure, I'll pay so you guys decide on where to eat. I'll pay~
Aiba: Wow, you really have money.
Koichi: Hey, don't you guys have more money?
Anniversary
Koichi: Although this cannot be used as a nice talk, but after this situation, it really allowed me to have a lot of new understanding about KinKi Kids.
Tsuyoshi: This time I gave plenty of trouble to everyone, especially Koichi, so please let me repay you if there's an opportunity in the future. Although it's not really suitable for me to say this, if Koichi faces any troubling matters in the future, you must rely on me, acting a little spoilt is also fine!
Koichi: I have never faced any troubling matters in my life. Such a happy life!
Tsuyoshi: Don't be stubborn, people like you like to force themselves...
Koichi: Hehe, aren't we both just like that, haven't we been like that all the while? This time as well, having a live broadcast, I believe that because it's the two of us, we would definitely be able to do it so I'm not worried at all. Therefore, because of this, I am able to enjoy this event from the bottom of my heart together with Tsuyoshi.