チラシ対策ステッカー
A few years ago, I weighed the flyers that would accumulate in my mailbox each month. Here are the results.
数年前、１ヶ月間に郵便箱に投函されるチラシの重さを計ったところ、以下の結果がでました。
5月 | May: 575g
6月 | June: 744g
7月 | July: 632g
My friends, who were also living in apartments in Tokyo, had similar results, with monthly flyer accumulation exceeding 500g per month.
東京のアパート住まいの友人たちに同じように計ってもらったところ、全員が月500グラム以上のチラシを受け取っていました。
Assuming that the average household in Tokyo receives 400 ~ 700 grams of flyers in their mailbox every month or some ~7kg of paper per year, this would add up to 43 million kilograms of paper and 7.5 million kilograms of ink used to produce flyers distributed in Tokyo alone, resulting in the deforestation of around ~5 million trees.
東京の一世帯が受け取るチラシが月400〜700g（年間約7kgの紙）の場合、東京だけでもチラシの製作に4,300万kg（4,300トン）の紙と750万kg（7,500トン）のインクを利用することになります。これは最大約500万本の木を伐採していることになるのです。
Most of us place these flyers directly into the trash.
殆どの場合、チラシは利用されることなくゴミになってしまいます。
So far, more than 1,000 of our listeners have received the anti-chirashi sticker via our website, potentially saving an estimated 7,200kg of paper or 172 trees.
すでに1,000人以上のリスナーの方達が番組ウェブサイトから「チラシお断り」ステッカーを受け取っています。これによって約7,200kgの紙（木172本分）を救ったことになります。
Summary
The average household in Tokyo receives ~600g of flyers in their mailbox per month. This is equivalent to 7.2kg of flyers per year. Tokyo uses ~43,000,000kg of paper and ~7,500,000kg of ink every year to produce flyers.
Assuming a rate of 1 tree per 16.67 reams of paper, this is equivalent to 5,764,153 trees. Even granting a 40% utilization rate of recycled materials, this is equivalent to 3,458,492 trees just for the production of chirashi.
Instead of placing these flyers directly in the trash, we recommend placing our anti-chirashi sticker on the mailbox. Most menus and local business information can be found online. So far, more than 1,000 of our listeners have acquired the anti-flyer sticker, potentially saving 4,320kg of paper or 114.6 trees.
Data / Assumptions
Tokyo has 6,946,000 households, with an average 1.94 persons per household. Oct 1 2015
Tokyo
~600g/month of paper per household1 reem of copy paper = 2.26kg
1kg = 0.4424 reems
1 tree = 16.67 reems (copy paper)42,509,520kg / 0.4424 = 96,088,427 reems
96,088,427 reems / 16.67 reems = 5,764,153 trees15% ink by weight
40% utilization recycled materials = 5,764,153 (0.6) = 3,458,492 treesCalculations
46,862,900 (Japan households) x 7.2kg / yr
(assuming households @ Tokyo チラシ level)
337,412,880kg / yr6,946,000 (Tokyo households) x 7.2kg/yr
50,011,200kg/yr of chirashi50,011,200kg * .85 = 42,509,520kg of paper
50,011,200kg * .15 = 7,501,680kg of ink42,509,520kg / 0.4424 = 96,088,427 reems
96,088,427 reems / 16.67 reems = 5,764,153 trees (Tokyo)Recycling Efficiency
Recovery rate: 60% (2015)
60% of paper used is recovered for potential reuseUtilization rate: 40.2% (2015)
40.2% of paper production is using recycled pulpGovernment report on paper recycling & source
http://www.prpc.or.jp/linkfile/english-paperrecycling.pdf“Recovery of printing & communication paper, inclusive of the aforementioned advertising inserts, was approximately 60%.”
“In 2015, the consumption of recovered paper in paper manufacture stood at 40.2%”