I’ve borrowed the basic guidelines (edited a little) from the 👨❤️👨 BL Book Club | Reading: 今日からマ王! to make things easier. We can change anything that doesn’t fit this club later. 
In order to get the ball rolling, you can submit up to 3 nominations (without any waiting periods) in this first round. 
I’ve made a little note. 
Nice!.
There’s definitely some stuff I’d read if it was in a BC, and I even have some physical ones in my TBR that might meet the criteria.
I’ll take a look tomorrow when I have some time.
What does ⅏ mean in the color column for Four Bunko?
It seems to be the style of the border for books that fall into this category - not a color but this kind of spiral doodle around the cover pic. If you click on the Amazon link for that publisher, you can see some examples.
Aaah, I see! That’s really cute!
Title: マジック・ツリーハウス 1 恐竜の谷の大冒険 | L19
Available formats: physical / audiobook / full-furigana
ジャックとアニーは、アメリカ・ペンシルベニア州に住む、なかよしきょうだい。ある日、ふたりは、森の大きなカシの木の上に、ふしぎなツリーハウスを見つける。中で本を見ていると、とつぜんツリーハウスがまわりだし、本のなかの世界へ行ってしまう。ついたところは、恐竜の時代。本物の恐竜たちと、なかよくなったり、追いかけられたり。ハラハラどきどきの大冒険がはじまった。はたして、ふたりは、ぶじに帰れるのか。
Story 1: Dinosaurs Before Dark
Where did the tree house come from?
Before Jack and Annie can find out, the mysterious tree house whisks them to the prehistoric past. Now they have to figure out how to get home. Can they do it before dark…or will they become a dinosaur’s dinner?
Story 2: Castle of Mystery
Eight-year-old Jack and his little sister, Annie, are playing in the woods during their summer holiday, when they find a mysterious tree house full of books. But these are no ordinary books . . . And this is no ordinary tree house . . .
Jack and Annie find themselves on another adventure - this time they’re in medieval England. It’s exactly the same as the story book - there’s a castle and a banquet and knights on horseback. But when they find themselves locked in a dungeon, Jack starts to wonder if they’ll ever get home again . . .
Reason(s) for nominating: This is a series that will be familiar to a lot of people, and I’ve been wanting to read it for a while (see Magic Tree House Book Club? 🏡, which will be the home thread if it’s picked 
).
At L19, it’s one of the easiest children’s novels on Natively, and there’s also an audiobook available. There are 50 books available in Japanese, each containing 2 stories, so there’s a lot of material if you find it a good level for your current language skills.
There’s also some resources that have been shared in the thread which look useful:
Nominations List | # | Cover | Natively page | Nomination post |
|---|---|---|---|
| 1 | |
マジック・ツリーハウス 1 恐竜の谷の大冒険 | L19 | link |
| 2 |  |
そして五人がいなくなる<名探偵夢水清志郎事件ノート> | L25 | link |
| 3 |  |
すみっこ★読書クラブ 事件ダイアリー 1 | L22?? | link |
| 4 | ふしぎ駄菓子屋 銭天堂 1 | L23 | link | |
| 5 |  |
手ぶくろを買いに/ごんぎつね 10歳までに読みたい日本名作 | L22 | link |
| 6 | 涼宮ハルヒの憂鬱 | link | |
| 7 |  |
二分間の冒険 | L27 | link |
| 8 |  |
小説 金の国 水の国 | L20?? | link |
| 9 |  |
四つ子ぐらし 1 ひみつの姉妹生活、スタート! | L22 | link |
.
Title: そして五人がいなくなる<名探偵夢水清志郎事件ノート> | L25
Available formats: physical / ebook / full-furigana
夢水清志郎は名探偵。表札にも名刺にも、ちゃんとそう書いてある。だけど、ものわすれの名人で、自分がごはんを食べたかどうかさえわすれちゃう。おまけに、ものぐさでマイペース。こんな名（迷）探偵が、つぎつぎに子どもを消してしまう怪人「伯爵」事件に挑戦すれば、たちまち謎は解決……するわけはない。笑いがいっぱいの謎解きミステリー。
(DeepL) Seishiro Yumemizu is a great detective. It says so on his nameplate and business card. However, he is a master at forgetting things, and even forgets whether or not he has eaten his dinner. In addition, he is lazy and slow-paced. When such a famous (and lost) detective takes on the case of the “Count,” a monster who makes children disappear one after another, the mystery will not be solved … immediately. A mystery filled with laughter.
None I’m aware of.
Reason(s) for nominating: My Japanese friend told me she enjoyed reading the 名探偵夢水清志郎事件ノート series growing up, and I have a soft spot for kid’s mystery fiction since that was what got me into reading as well. And reading a kid’s mystery book might be good practice for reading adult mystery books!
Title: すみっこ★読書クラブ 事件ダイアリー 1 | L22??
Available formats: physical / ebook / full-furigana
みずから認める、＜すみっこ系わき役女子＞の和登千秋（わと・ちあき）。中学デビューをめざしていたのに、しょっぱなから風邪でお休み、帰宅部ルーキーに。あまり読書の習慣はないのに、ひょんなことから、友だち100人いそうなイケメンの同級生、本田宗六（ほんだ・そうろく）に、読書クラブ、そして探偵の助手に誘われて－－!?本田宗六がシャーロック・ホームズの日本名で、ホームズの助手はワトソン、わたしの名前が「わと」だからって、なぜ私が探偵助手に！？友だち0人の和登の中学生ライフがはじまります！
(DeepL) Chiaki Wato is, by her own admission, a shy, reserved girl. She had hoped to make her debut in junior high school, but a cold forced her to take the first day off, and she became a rookie in the club she went home with. She is not much of a reader, but by chance, a handsome classmate, Soroku Honda, who looks like he has 100 friends, invites her to join the reading club and become an assistant detective…? Why am I an assistant detective just because Soroku Honda is the Japanese name of Sherlock Holmes, Holmes’ assistant is Watson, and my name is “Watoto”? With zero friends, Watoto’s life as a junior high school student is about to begin!
None I’m aware of.
Reason(s) for nominating: The combination 読書 (reading) and 探偵 (detective) themes sounds fun, and the Sherlock Holmes play on words in the description cracked me up 
This series also shares an author with ふしぎ古書店1 福の神はじめました | L23, which I found very fun and engaging for a children’s book.
Title: ふしぎ駄菓子屋 銭天堂 1 | L23
Available formats: physical / ebook / audiobook / partial furigana
駄菓子屋があった。路地の壁にはりつくような形の店で、まるで商店街から身をかくしているようだ。だが、店先には、色とりどりの菓子がならんでいるのが見える。真由美は首をかしげた。あんなところに、駄菓子屋さんなんてあったっけ？この道は、もう何百回と通っているけど、あんな店、見たことない…。その駄菓子屋は幸せと不幸のわかれ道。
There was a candy shop. The shop seems to be hidden from the shopping street, as if it is clinging to the wall of an alleyway. However, a colourful array of sweets can be seen in front of the shop. Mayumi tilted her head. Was there ever a candy shop there? I’ve been down this road hundreds of times, but I’ve never seen a shop like that… That candy shop was the dividing line between happiness and unhappiness. (DeepL)
Reason(s) for nominating: This is the first volume of a popular series containing short stories, which sounds like it should be a relatively easy read, especially as the stories follow a similar formula. It was read over on WK a few years ago, so there’s already a vocabulary list and the weekly threads for reference. An audiobook being available is another plus!
Joining. I need the leg-up for book reading I think.
Title: 手ぶくろを買いに/ごんぎつね 10歳までに読みたい日本名作 | L22
Available formats: physical / ebook / full furigana
★★小学生に読まれてシリーズ累計215万部突破★★
お子さんに、お孫さんに、入学やお誕生日のプレゼントに!
[何度も読みたい新美南吉の名作5話を収録]
収録作品・・・『手ぶくろを買いに』『ごんぎつね』『花のき村と盗人たち』『決闘』『でんでんむしのかなしみ』
この本のみどころ・おすすめ
1.オールカラーイラストで、名作がぐっと身近に
1冊に50点以上ものカラーイラストを掲載。お話の世界に入りこむ手助けをします。
2.物語をわかりやすく紹介「物語ナビ」
登場人物や原作者についてなど、物語のイメージがつかめる「物語ナビ」つき。ささっと見返せるので、感想文を書くときにも便利です。
3.小学生向けに、言葉の解説入り
小学生が楽しめるように現代仮名遣いにし、難しい言葉や表現は、注釈で補足しています。
(Source: Amazon.co.jp)
5 short fairy tales for children written by 新美 南吉 (Niimi Nankichi):
Death
Reason(s) for nominating: A while ago I stumbled upon ごん狐, which turned out to be the first story that I read in Japanese that I liked so much that I gave it 5/5 stars on Natively. Despite being a fairy tale for children, neither the writing style nor the content felt childish to me at all.
Since then I’ve been wanting to read other stories by 新美 南吉. And because I’m also a sucker for cute art, this book that collects ごん狐 and four other of his short stories seems like a perfect choice for me!
Pros and Cons
Pros:
Cons:
In case anyone wants to avoid paying for an ebook, these are all out of copyright 
手袋を買いに
ごん狐
花のき村と盗人たち
でんでんむしのかなしみ
Sadly I couldn’t find 決闘 anywhere - it’s not yet on Aozora (eligible, though) and no one seems to have put it online elsewhere yet
Title:
Available formats: physical (see note) / ebook / full furigana
「ただの人間には興味ありません。この中に宇宙人、未来人、超能力者がいたら、あたしのところに来なさい。以上」入学早々、ぶっ飛んだ挨拶をかましてくれた涼宮ハルヒ。ビミョーに非日常系学園ストーリー!
Kyon, your typical high school student, has long given up his belief in the supernatural. However, upon meeting Haruhi Suzumiya, he quickly finds out that it is the supernatural that she is interested in; aliens, time travelers and espers among other things. When Haruhi laments about the lack of intriguing clubs around school, Kyon inspires Haruhi to form her own club. As a result, the SOS Brigade is formed, a club which specializes in all that is the supernatural.
Might contain hard words although the words have been changed in the Tsubasa Bunko edition for making it easier to read
Reason(s) for nominating: I always wanted to read the original material, but it feels a bit daunting at my level, so I think this would be a nice way to test the waters and an entry point.
Would this one be out because of the grading? Although it’s only one user that graded I think, so it’s not a very set in stone one.
I overlooked the grading limit. Thanks for the reminder. 
Maybe the tsubasa bunko version is okay?
You linked to the non-tsubasa bunko on LN, so the rating might be lower on the other one.
LeNa doesn’t have separate entries for the tsubasa version though… and not sure that just furigana would lower a book by 4 levels. 
Haruhi doesn’t have either, but I requested it to be added.
Some books have some re-wording to make it more accessible, but it varies by book.
Title: 二分間の冒険
Available formats: physical / ebook / audiobook / partial furigana
ふしぎな黒猫に誘われて、学校の校庭から、子どもたちだけが住む世界に迷いこんでしまった悟。やがて、悟は仲間とともに、この世界を支配している竜と闘うことになります。予想できない展開の連続の中で、子どもたちは〈一番確かなもの〉を探していく。壮大な冒険のドラマ。
DeepL because I’m lazy:
Satoru is lured by a mysterious black cat and wanders out of his schoolyard into a world inhabited only by children. Soon, Satoru and his friends are battling the dragon that rules this world. In a series of unpredictable developments, the children search for "the most certain thing. This is an epic adventure drama.
no idea.
Reason(s) for nominating: it’s been in my TBR forever so I’m hoping to find ways to promote this to myself lol
