The Weight of 38 Can Badges in an Ita-bag: What Oshikatsu Merchandise Culture Doesn't Tell You

What You See When You Start Laying Can Badges at the Bottom of an Ita-bag

When I first laid about 10 can badges at the bottom of my ita-bag (痛バッグ, itaitashii = painful, a reference to excessively decorated bags), it felt light. Based on the standard 57mm diameter, one can badge weighs about 13g. Ten of them come to roughly 130g — the weight of a smartphone. The problem starts from here. Collect six expression variations of the same character, add four event-limited designs, and include collaboration café bonuses, and before you know it you're past 20. The moment you exceed 30, the sensation of carrying the bag on your shoulder changes.

My ita-bag filled with 38 badges measured approximately 750g including the bag body. The badges alone were 520g. Add three acrylic stands (averaging 30g each) and five rubber straps (15g each), and you're approaching 1kg. What bears this weight isn't the bag strap but your shoulder. After attending a two-hour concert or event, shoulder stiffness arrives the next day. The glamorous ita-bag verification shots posted on social media don't mention this weight.

Let me state the conclusion first. Ita-bag culture is a compromise between "display" and "portability." Figures in a glass cabinet don't require concern about weight, but ita-bags must be carried. This physical limitation determines the direction of oshikatsu merchandise collecting. The moment you choose thin acrylic cards instead of heavy can badges, the moment you begin calculating probabilities in front of a random box, the moment you select only "what you truly want" rather than all the bonuses — oshikatsu compromises with reality.

Why the Weight of a Single Can Badge Matters

Standard 57mm diameter can badges average 13-15g. The thickness of the pin mechanism metal varies by manufacturer, and coating methods create 1-2g differences. Small 44mm ones weigh 8-10g, large 76mm ones weigh 20-25g. The numbers look small, but this weight accumulates. Six expression variations of the same character make 90g, twelve seasonal costume variations make 180g.

The problem is that oshikatsu doesn't end with "just one." Two as visiting bonuses from a collaboration café, five from a random box at the event merchandise area, three as Animate reservation bonuses — gaining 10 in a month is common. As of 2023, popular works release an average of 60-80 can badge designs annually. Collecting them all is physically impossible. Selection becomes necessary.

Ita-bag surface area also has limits. On the front of a standard B5-size ita-bag, you can arrange about 25-30 57mm badges without gaps. You can increase to 40 by overlapping, but then more than half of the back row designs are hidden. If it's decoration meant "to be shown" but half isn't visible, that's storage, not display. Eventually, oshikatsu veterans learn "selection and rotation." They swap out the can badges in their ita-bags each season and store the rest at home.

What You Calculate in Front of a Random Box

Can badge random boxes usually contain 6-8 designs. If one box contains 8 badges and there's one secret (hidden rare design), that's 9 types total. Complete set probability has no official manufacturer announcement, so we rely on community statistics. Typically, purchasing one box yields 3-4 duplicates, two boxes get you 6-7 types, and you need to buy three boxes for the probability of getting all types plus the secret to exceed 50%. If one box averages 4,000-5,000 won, complete set collection requires at least 12,000-15,000 won.

Weight adds to this. Three random box sets mean 24 can badges, approximately 350g. If you already have 20 on your ita-bag, that's 44 total, 650g. This is the threshold where shoulders start to struggle. Eventually you realize "I can't attach them all to the ita-bag," and you either offer duplicates for trading, give them to friends, or store them in a drawer at home. But then, was there any need to buy three boxes in the first place — oshikatsu reaches a turning point before this question.

These days, individual sales and complete box sets are available. Prices are 10-20% higher than random boxes, but you can buy only what you want without duplicates. After filling 38 can badges, my conclusion was "random for fun, individual for efficiency." If you only need 1-2 new designs of your oshi character, buy individuals; only buy random boxes when you like all the designs. Unless you're enjoying the probability game, you can save money and weight.

Ensemble Stars!! Bright me up!! Collection Can Badge [2025 Sep.]-Casual Side- (Set of 12) →

Acrylic Stands vs. Can Badges: Which Benefits an Ita-bag More?

Acrylic stands (abbreviated as acrylic stand) are lighter than can badges. At 70-100mm height, they average 25-35g — the weight of 2-3 can badges. But they take up more volume. The 3-5mm thickness is burdensome for laying flat on the ita-bag bottom, and standing them upright causes their height to overlap with other merchandise. Ultimately, acrylic stands end up positioned separately at the top or side pockets of the ita-bag.

Can badges have higher "display" efficiency per weight. With the same 100g you can arrange 7-8 can badges, and their high color density makes them vibrant even from a distance. Acrylic stands are limited to 3-4 pieces, but they have advantages in three-dimensionality and design detail. Acrylic stands featuring full-body character illustrations have higher completion as "a single artwork" than can badges showing only faces. I prefer placing 1-2 acrylic stands as the centerpiece of my ita-bag and filling the surroundings with can badges.

Rubber straps cannot be overlooked either. At 10-15g each, they're lighter than can badges while providing three-dimensionality. They're good for adding accent points by hanging them on ita-bag straps or zippers. The downside is durability. Rubber material can become sticky or discolored after 2-3 years. Can badges last 10 years as long as the metal pin doesn't rust. If you want to preserve oshikatsu as a "record," choose can badges; if you want immediate vibrancy, mixing acrylic and rubber is the answer.

Common Mistakes When Decorating Your First Ita-bag

The most common mistake is "just attach a lot and see what happens." I did this with my first ita-bag too. I laid out 30 can badges without gaps, inserted 5 acrylic stands, and attached 8 rubber straps. The result was "information overload." From a distance you couldn't tell what character it was, and even up close your attention scattered. Weight was 1.2kg. My shoulder hurt after carrying it for just 30 minutes.

The second mistake is "pin direction." If you simply insert can badge pins into the ita-bag fabric, they'll shake as you walk and the pins will come loose. You need to back it with a dedicated transparent sheet or hard board to secure the pins. I once lost 3 can badges on the street after inserting them without a sheet. If they were bonuses or limited editions, there's no way to recover them. Nowadays ita-bag manufacturers include PVC boards as standard, but until the mid-2010s they were sold separately.

The third is "mixing without concept." Mixing multiple characters from the same work in one bag reduces unity. It looks better to unify with one oshi character, or at least compose within the same unit/team. The exception is "all-character ita-bags" — they read as a message of loving the entire work, but in this case arrangement sense becomes more important. You must balance colors and adjust proportions by character so it looks like "a display bag" rather than "a bag with random things attached."

Ensemble Stars!! Bright me up!! Collection Can Badge [2025 Nov.]-Idol Side- (Set of 13) →

What Happens When You Bring an Ita-bag to Events

An ita-bag has different meanings when photographed at home versus at an event venue. At concerts, fan meetings, or otaku events like Comiket, an ita-bag is a "business card." When eyes meet between people carrying ita-bags of the same character, conversation starts naturally. "Where did you get that secret?" "Did you visit the collaboration café?" While communities interact online, at venues ita-bags become signals.

At event merchandise areas, an ita-bag is also a "certificate." When buying new merchandise while carrying an ita-bag of the same character, booth staff and surrounding fans recognize you as "a true fan." Random box trading becomes easier thanks to ita-bags too. If you attach the design you're looking for to your ita-bag, offers come in: "I have that one, want to trade?" Offline trading is faster than online and has no shipping costs since it's direct transaction.

However, when you go to general public spaces (subway, café) with an ita-bag, stares can be harsh. In Korea as of 2024, ita-bags are recognized as "otaku culture," and some view them as showing off or causing inconvenience. On a crowded subway, a bag with 40 can badges takes up space, and sharp pins might catch on others' clothes. I only carry my ita-bag to events, and normally keep it in a regular bag. Oshikatsu is self-satisfaction, but it must be enjoyed within limits that don't inconvenience others to be respected as culture rather than nuisance.

The Distance Between SNS Verification Shots and Real Ita-bags

Ita-bag verification shots uploaded to Instagram or Twitter are mostly "optimal angles." Under natural light, the ita-bag is laid flat, can badges positioned to reflect light. Filters make colors vivid, and slight retouching removes pin marks or dust. Viewers exclaim "Wow, beautiful," but the appearance after carrying the real thing on your shoulder for three hours is different.

Ita-bags are "consumables." Fabric is vulnerable to friction, and PVC transparent windows get scratched. Repeatedly removing and inserting can badges widens pin holes, and over time the fabric stretches. An ita-bag used for more than two years shows signs of wear no matter how well maintained. That's why oshikatsu veterans separate "display" and "portable" bags. For photos at home they attach only carefully selected merchandise to a new ita-bag, and for actual events they carry only replaceable merchandise in a slightly worn bag.

There are realities that don't appear on SNS. The cost of decorating one ita-bag. Calculating 38 can badges at an average of 500 won each gives 19,000 won, 3 acrylic stands at 3,000 won each is 9,000 won, ita-bag body 25,000 won — total 53,000 won. Play the random box probability game on top of this and 100,000 won is easily exceeded. A single verification shot cannot contain the money and time invested until one ita-bag is complete. But that process itself is the joy of oshikatsu.

Pokemon Center Can Badge Pokemon Master Ball →

How Ita-bag Culture Differs from Figure Collecting

Figures are purchased as "finished products." Put them in the glass cabinet and you're done. With good arrangement they can stay in that spot for 10 or 20 years. Ita-bags are different. You "combine," "arrange," and "swap" merchandise. Even the same ita-bag becomes completely different when you change the can badges attached inside. The composition changes with each season, each event, each new merchandise release. If figures are a culture of "possession," ita-bags are a culture of "updating."

Weight and volume constraints also differ. Even if a 1/7 scale figure is heavy, it's fixed inside the glass cabinet so no problem. Ita-bags must be carried on the shoulder, so weight becomes the immediate limit. You can attach beyond 38 to 50 or 60, but then it becomes "luggage" rather than a "bag." Ultimately with ita-bags, skill isn't "how much you've collected" but "how you've selected and arranged."

Oshikatsu merchandise also has rapid release cycles. Popular works release 5-10 new can badge designs monthly. Figures see 2-3 releases per year, each suffering months of release delays, but merchandise comes out within 1-2 months of announcement. Keeping up keeps your wallet busy. However, individual prices ranging from 500-3,000 won make them less burdensome than figures. But when quantities stack up, total amounts become similar. With the money for one 1/7 scale you can buy 30 can badges, but the satisfaction from each is different. I cannot definitively say which is better.

FAQ

Is there a recommended merchandise combination for ita-bag beginners?

If you're starting out, I recommend a combination of 10-15 can badges plus 1-2 acrylic stands. Weight stays around 200-250g, light while not looking sparse. Rather than random boxes, collect only desired designs without duplicates through individual or set purchases. For the ita-bag body, B5-size transparent window products (around 20,000 won) are safe choices. Selecting products that include a dedicated PVC board makes can badge pin securing easier.

Will can badges fade if stored long-term?

They preserve for over 10 years if you avoid direct sunlight. Can badge surfaces are finished with UV coating or epoxy resin, giving them higher light resistance than ordinary printed materials. However, if left in a sunlit location while attached to an ita-bag, fading is possible within 1-2 years. Store unused can badges in zipper bags in drawers. The metal pin section is vulnerable to moisture, so including desiccant helps prevent rust.

Is it a nuisance to carry an ita-bag around?

While welcomed at event venues or otaku cultural spaces, caution is needed in general public transportation or public places due to bulk and pins. On crowded subways, carry the bag in front or in your hand; in cafés, place it on the floor rather than chair backs. Products exist that cover pin tips with transparent sheets to prevent catching on others' clothing. Oshikatsu is enjoyable, but it must be enjoyed within limits that don't inconvenience others to be respected as culture.

Is there a way to increase random box complete set probability?

While there's no official announcement, community statistics suggest one box (8 pieces) purchase gives roughly 30% probability for complete set (6-8 types), two boxes 70%, three boxes over 90%. Complete set including secret may require 5 or more boxes. To reduce costs, buy only one box and obtain the rest through trading or secondhand individual purchases. These days post-release exchange posts are active in online communities, so using SNS hashtags or trading communities lets you collect complete sets at near-original prices.

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May good fortune reach your glass cabinet today as well.