Hiroshi Suzuki had a fulfilling career in which he traveled the world as an engineer. Then, at age 65, he retired.

That didn’t last long. For the past seven years Mr Suzuki, 72, has been a nursing aide in the Tokyo area, and says he’s years away from true retirement.

Economists say if Japan wants to alleviate its worsening labour shortage, it needs a whole lot more people like Mr Suzuki, who is atypical by working into his Seventies.

Though it boasts the world’s oldest population, the country does an inadequate job of employing healthy seniors, they say.

The reasons: Company policies, work culture and a history of rigid seniority rules that work against older employees, providing a cautionary tale to aging economies including those in Europe and the US.

“People in their Seventies can still work. There are still so many things you can do as long as you are healthy,” said Mr Suzuki, who was a designer and engineer for an electric-furnace manufacturer and now works at a nursing home run by Care 21, one of the few Japanese companies that have abolished a mandatory retirement age.

“There’s no need to think about retiring until you turn 80.”

Mr Suzuki is part of the largest group of people age 65-and-older in the world; numbering more than 33 million, they represent more than a quarter of Japan’s population.

With the world’s longest life expectancy — by 2050 women in the country on average will live past 90 — and a low birth rate, the working-age population is shrinking.

Japan’s demographic reality is so extreme that even though it has the highest proportion of working seniors among developed countries, according to the Organisation for Economic Cooperation and Development, it’s not nearly enough to stem the labour shortage.

The number of workers older than 65 rose to 7.3 million in 2015, or 21.7 per cent of the population for that age group, according to data from the statistics bureau.

Japan’s worsening worker shortage also is stark: the number of workers is projected to decline to 56 million in 2030 from 64 million in 2014.

This forecast by the Japan Institute for Labour Policy and Training, a government-related group, is based on conditions that the economy and the labour force participation rate won’t change.

To avoid such a shortage, the country needs to come up with more innovative policies to pull seniors into the workforce.

Stacked Against

Yet Japan’s corporate structure is still stacked against widespread employment of older workers.

Though some companies have introduced merit-based pay, moving away from a seniority system, age remains an important factor and the career ladder ends for many employees at 60 or before.

Mandatory retirement is still in effect in many companies, though there is no official retirement age in Japan.

“People in Japan have long, healthy lives, and laws and company policies in the country have not kept up in terms of making use of their longevity,” said Florian Kohlbacher, an adjunct professor at Temple University’s Tokyo campus and director of the Economist Corporate Network for North Asia.

“Age 60 is still very, very young in Japan. If you want to tackle this issue, you can’t just have people work longer, you need to rethink the whole HR system in Japan.”

Hideko Kurihara, 79-year-old, exercises with wooden dumbbells during a health promotion event to mark Japan's "Respect for the Aged Day" (Reuters)

And even recent advances won’t do much to alleviate the labour shortage as the percentage of seniors in the workforce declines markedly as they age, said Robert Feldman, chief economist at Morgan Stanley in Tokyo.

He calculates that labour force participation in Japan for men aged 65 to 69 is 54 per cent, and for women it’s 32 per cent – good figures compared with other major economies.

Yet for men 70 and older it falls to 20.3 per cent and for women in that age group plummets to 9.3 percent.

You’d need a lot more older workers taking jobs to make a dent in the labour crunch, Mr Feldman said.

“The increase in participation rates is offset by shifting shares of population,” meaning Japan’s population is aging so rapidly that more people are leaving the labour force even as a higher percentage of seniors take jobs.

Changing Rules

The Government, in April 2013 changed rules to require employers to keep on all workers who want to stay until age 65.

Under that system, most companies basically have workers retire at 60 and return under a “continuous employment” policy at a lower wage – often a much lower wage.

This is less costly than raising the retirement age or abolishing a mandatory retirement system, the other two choices that companies have.

“Japan is going into the phase that needs to utilise a silver workforce more as the nation’s population is growing older,” said Ryuichi Okumura, a research fellow at Mitsubishi Research Institute in Tokyo.

“Japan could offer a hint of solution to other nations as a test bed for utilizing more senior people in the workplace and making them more active in various fields in the society.”

Prime Minister Shinzo Abe claims victory in Japan election

Many of those who’ve found jobs after mandatory retirement want to keep working not only to stay active – they need the money.

Japan’s government is gradually raising the age at which people become eligible for pensions to 65 from 60, leaving many with a gap.

Also, pensioners on fixed incomes are more vulnerable to swings in the economy and many were hit hard by the last sales tax increase in April 2014.

Sonoe Kudo, 65, who works at a nursing home in Tokyo run by Care 21, said she wants to work into her Seventies as long as she’s healthy.

With her living costs and a premium for nursing-care insurance, it can be tough to make ends meet on a reduced pension. “Elderly people can’t really live only by pensions,” she said.

Mandatory Retirement

About 81 per cent of Japanese companies still set the retirement age at 60. The latest survey by Japan’s labour ministry showed that only 3 per cent of companies abolished their retirement system and about 16 per cent raised their retirement age, while more than 80 per cent opted for the continuous employment system.

Among employees who work at companies requiring they retire at 60, more than 80 per cent were rehired or extended their employment, according to the survey.

Yet that continued employment often means a big pay cut. Average annual income, including pension payments, for re-employed full-time workers in their early 60s was 3.8 million yen (£28,000) according to a survey by the Japan Institute for Labour Policy and Training.

The survey showed that the average worker’s salary at age 61 was about 27 per cent less than it was just before the employee turned 60.

Another survey showed that average monthly wages for full-time male workers in Japan ages 60-64 was 292,000 yen, about 30 per cent lower than 412,000 yen for those ages 55-59, according to 2015 data from the labour ministry.

“At the moment, many companies are taking a protective strategy — just simply responding to a regulatory change in the employment system,” Okumura said.

“Companies should shift to a more aggressive strategy to utilise elderly workers as a substantial part of their workforce.”

Productivity Issue

One reason many Japanese companies are reluctant to keep older workers in key positions is that they’re more costly than younger workers, as seniority is still a major factor in setting salaries in Japan.

Feldman says if Japanese workers’ productivity improved as they aged, companies would want to retain them rather than push them out.

He says his “wild-and-crazy proposal” is to lower the minimum retirement age in Japan to 40, figuring that “if the firm isn’t obligated to keep you after 40, you’ll need to keep your skills current.”

He also says the high percentage of companies rehiring workers at lower salaries after they turn 60 underscores another problem in Japan — the lack of workforce mobility.

“Essentially, what’s happened here is that these people are not mobile enough to get another job, so they take what they can get” from their current employer, he said.

Other Approaches

Daiwa House Industry, Japan’s biggest home builder, has decided to come up with another system.

It’s one of the few Japanese companies that has raised its mandatory retirement age, to 65, and also has introduced a system making those 65 and older eligible to work as contract staff – with no age limit. It has proven popular.

“While the age of eligibility for receiving corporate pensions is pushing back gradually, we think that it’s our corporate responsibility to consider our employees’ life planning in the future,” said Yoshio Saeki, general manager of the human resources department at Daiwa House. “We are trying to increase the options for workers.”

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Care 21, a nursing service provider, abolished its mandatory retirement system in April 2014. The proportion of its total workforce made up by employees older than 60 has increased to 16.6 per cent from 11.5 per cent , according to the company. The oldest employee is an 86-year-old female home helper.

Taira Yoda, 64, president of Care 21, said the company abolished mandatory retirement because it’s in an industry with a significant labour shortage, and it wants to give employees the option to earn stable income when they’re older.

“We can further develop the ability of senior workers. They have the capacity to do more,” Yoda said. “If Japanese companies can do it, their know-how can be applied to other nations facing aging populations.”