A good way to protect your manga – Book-Kun

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I love all my books and manga and always try to protect them the best way possible. On my visit to Tokyo, I discovered these lovely book protective sleeves at K-Books in Akihabara and had to buy a couple for my latest purchases. The quality is quite good, the price with 120-200¥ depending on the size, is not that bad and it’s really easy to apply them to your books. There are 10 pieces in each packaging, so you can do the math what one of these ブッカー君, how they are actually called, might cost you.


Unfortunately, I haven’t found a place outside of Japan which is offering these. Even our beloved honto bookstore doesn’t carry any. There are some others brands around offering these protective sleeves but until today I haven’t found a good source for them. When you’re currently in Japan trying to pick some ブッカー君 up for yourself, Tsutaya should always have some in their manga sections. I bought maybe 20-30 of these in different sizes so I’m all set, book-cover-wise.

Update: One of the readers mentioned that you can get these transparent book covers at cdjapan. Thanks a lot for finding these!

And now I should really go and work on my Japanese grammar. I have been slacking a bit these last few weeks. Genki here I come.

book kun manga sleeves





Maybe you were wondering why all my manga looked to “shiny” on my pictures. That’s because I applied these book sleeves to all of them. It’s good for reading and storing them but always a pain to take proper pictures because of the reflections.


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  • FiH

    Ich würd wirklich gerne welche von den Schutzhüllen für meine Mangas haben. Scheinen mir wie du schon erwähnt hast, sehr nützlich. Nur ich habe auch noch keinen Ort gefunden wo man welche bekommt. War letztens in Düsseldorf wo es auch japanische Buchhandlungen gibt bin dort aber auch nicht fündig geworden. Naja weitersuchen. Auf jedenfall ein toller Blog den du hier hast. Ich schau regelmäßig vorbei. Also mach nur weiter so.

    • https://www.japanesetease.net/ JapaneseTease

      Merci für die nette Worte. Freut mich sehr, dass dir die Seite gefällt :) leider habe ich auch noch keinen Shop gefunden, der diese Hüllen ins Ausland versendet. Bei rakuten könnte es aber vielleicht einen Händler geben, oder du bestellst gleich einen ganzen Haufen von den Hüllen über einen Mittelsmann in Japan. Selbst als ich in Tokyo war, wussten die meisten Verkäufer nicht was für Hüllen ich da genau suche. Das hat zum Einen natürlich an meinem beschissenen Japanisch gelegen, aber besonders bekannt sind die Dinger selbst in Japan nicht.

  • Shahrzad

    They’re wonderful. I need them. Witch one is good to cover Yotsubato? I’m bad at calculating so please save me here!
    Thank you so much for sharing.

    • https://www.japanesetease.net/ JapaneseTease

      Glad you like them. I have to admit that I’m really fond of these covers. Just feels good to wrap all those new manga which just came in.
      You would have to use the green ones where 青年 is written on the to left (green) strip.
      The red ones fit bigger manga like all complete editions and Shirokuma Café.
      The blue ones are for all small shonen manga.

  • Guest

    Thank you very much. I love my mangas and would hate it to find them get dirty. I asked cdjapan about the covers and found out they have them already! Based on what you mentioned B6 is good for Yotsubato. I leave the link here in case someone is interested.


    • https://www.japanesetease.net/ JapaneseTease

      Thanks a lot!!! Just updated the page as well. Really glad that you managed to find these online, will need some more of the big ones soon.

      • Shahrzad

        You’re welcome ^-^. (Forgot to sighn in before *_*)

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  • jhovanny

    Hey I wanted to know witch ones will fit perfectly with my naruto manga collection? Thank you

    • https://www.japanesetease.net/ JapaneseTease

      The 少年 ones fit perfectly (with the blue ribbon)

  • Tengaku

    can anyone tell me that which size is the perfect fit for standard paperback manga. Thanks.

    • https://www.japanesetease.net/ JapaneseTease

      If you are referring to the ever popular JUMP manga and their classic sizing 少年 ones fit perfectly (with the blue ribbon)

  • Ruka

    Hello! I want to know which ones are fitting for the HxH Volumes! Thank youuuuuu~~~<333

    • https://www.japanesetease.net/ JapaneseTease

      Classic JUMP sizing so just get the ones with the blue ribbon (少年)

  • Meli Serrano

    help!!!! what if i have the 3 in 1 manga edition or the vizbig edition?

    • https://www.japanesetease.net/ JapaneseTease

      These protected sleeves only cater to the Japanese market and are probably not compatible with most US editions unless they just used the Japanese format. There are definitely none for these super big 3 in 1 editions.

  • Jeffrey

    Hi, may i ask the sticker peeling part is to stick on the manga book itself? It is the back of the book right? Thank u so much.

    • https://www.japanesetease.net/ JapaneseTease

      The sticky part just connects to the foil itself when you wrapped it around your manga. No glue will touch your comic.

  • animebento

    which one’s will fit viz media manga like naruto or one piece?

    • https://www.japanesetease.net/ JapaneseTease

      If they preserved the Japanese format you can use the ones with the blue ribbon saying 少年少女

  • Mirquin

    Hi! Which sleeve should I get for Kuroshitsuji? The dimensions are 18 x 12.8 x 2.2 cm

    • https://www.japanesetease.net/ JapaneseTease

      The 青年 one (green) is 18cm x 13cm and will fit this title perfectly.

  • Ramon Victoria

    hello there!!! I was wondering what size would be suitable for the Tokyo pop North American manga format??

    • https://www.japanesetease.net/ JapaneseTease

      Hey Ramon, I don’t own any of these books but if you post the measurements in cm I can compare the size with my Japanese manga.

      • Ramon Victoria

        Its 19.05cm(height) x 12.7cm(width) tnx!!!

        • https://www.japanesetease.net/ JapaneseTease

          Won‘t be home till tomorrow evening but will check it then and get back to you

        • https://www.japanesetease.net/ JapaneseTease

          Sorry for the late reply Ramon, but I completely forgot about it.

          I just measured both Shirokuma cafe and Yotsubato and both won’t fit the dimensions you mentioned. The A5 one would be your best bet with 21cm (length) to 15cm (width). The 青年 one (green) is 18cm x 13cm.

  • Jaethan Marquez

    Do you know which cover could work with the Tokyo Ghoul volumes in the US? The dimensions are 5.8 x 0.8 x 8.2 inches.