教員コラムBlog

  1. home
  2. 教員コラム / Blog
  3. 詳細 / Detail

The Great Hay Fever Mistake

2024.07.15

Photo Credit: Karolina Kaboompics@pexels.com

 

 

Covid-19 measures have been lifted, yet many people continue to wear masks outdoors; a culture which has grown in recent years. One of the main reasons for this is the dreaded ‘kafunsho’. 40% of Japan’s population have this allergy. If you are lucky enough to be unaffected you most certainly know a beleaguered hay fever sufferer.

 

Japan’s huge population of cedar (sugi) and cypress (hinoki) trees begin dropping their pollen at the start of the year - two weeks earlier than last year in some parts of the country due to warmer weather. Why are there so many of these tree species in Japan? To answer this question, we need to take a step back in time.

 

During WWII Japan used a lot of wood for production and construction. Forests were also lost to bombing and fire damage. Afterwards, as the country rebuilt its infrastructure, the Japanese government ordered villagers to plant millions of trees for future building projects and protection from landslides and floods.

 

However, instead of planting trees like Japanese beech (bunanoki), the government chose to plant only two tree species, the fast-growing evergreens, cypress and cedar. On top of that, some natural ancient forests were replaced with human-made plantation forests because cypress and cedar could be sold more profitably. As a result, 44% of Japan’s forests [https://www.nippon.com/en/features/c03913/] have only one or two species.

 

For the next twenty years, the trees were cared for, but from the 1970s, the price of imported building materials from Southeast Asia began to drop, leaving nowhere for these new trees to be sold. They were abandoned to live out their natural lives, unharvested and releasing huge amounts of pollen into the air every year.

 

Back to the present day, the task of recreating more vibrant and biodiverse forests won’t be easy. Japanese forestry law still puts limits on the reintroduction of more native species because when an adult cypress or cedar is cut down, it must be replaced with a seedling of the same type.

 

Every year hay fever allergy symptoms cost the global economy two billion US dollars due to sick days and lost productivity. This year, some Japanese companies have even provided hay fever allowances for employees to spend on prescription treatments and clinic visits. Prime Minister Kishida has called it a ‘social problem’ and ‘national disease’, promising to take urgent government action, most likely in the form of replanting forests with trees that drop less pollen and promoting a type of GMO rice that may lessen hay fever symptoms. It is a step in the right direction, but there will be no quick fix.

 

Forestry companies like Hyakumori [https://www.hyakumori.com/] fully understand that the solution will take time. Its ‘100-year plan’ aims to increase biodiversity and encourage long-term thinking about environmental issues. Hyakumori wants Japan to use a totally different and sustainable model for forest management. This could be possible if the government updates its policies and allows for more local control of forest transformation.

 

 

Blog Quiz:

 

Q1. In the last sentence of the first paragraph, what does the word ‘beleaguered’

mean?

Q2. Why were the evergreens, cypress and cedar trees planted after WWII?

Q3. In the last sentence of the second-last paragraph, what does the phrase ‘a step in the right direction’ mean?

 

Scroll down to see the answers below.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Answers:

1.           Stressed / harassed / long-suffering

2.           They are fast-growing trees that could be sold profitably.

3.           An action that positively advances a plan towards a goal.

戻る / go back

Related posts