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Kosuke Iwasaki

FIAJ, MAAA, MBA
Principal
Tokyo, JP

Kosuke Iwasaki joined Milliman’s Tokyo office in 1999 and moved to New York in 2000. As a consulting actuary in healthcare and life insurance, he has contributed to or managed projects with life/health insurance companies, pharmaceutical companies, medical device companies, disease management companies, managed care organizations, and research institutes.

After 13 years in New York, he returned to Milliman’s Tokyo office in July of 2013 to establish the firm’s healthcare and data analytics practice in Japan.

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Experience

  • Health technology assessment (HTA) including cost-effectiveness, cost-utilization, and cost-benefit analysis for pharmaceutical companies and medical device companies
  • Economic value of drugs, including antihypertensive and anti-hyperlipidemic agents, diabetes drugs, hepatitis C drugs, antidepressants, anticancer agents, anticoagulation drugs, and drugs for COPD, hemophilia, and amyotrophic lateral sclerosis
  • Economic value of bariatric surgery
  • Economic value of disease management programs and screening
  • Analysis on adverse drug events for hospitals
  • Value-based design of health insurance, including the cost-sharing structure of diabetes drugs and chemotherapy for cancer patients
  • Development of a predictive model for a disease management company in Japan
  • Development of a predictive model for long-term care cost
  • Development of budget impact models (BIMs) for drugs for diabetes and hepatitis C patients
  • Development of benchmarks on outcomes for hospitals
  • Stochastic modeling, including:
    • Generalized linear model (GLM)
    • Survival model
    • Hierarchal Bayesian model
    • Bayesian network model
  • Development of healthcare reform models for accountable care organizations (ACOs)
  • Development of health insurance products, disability income products, long-term care products, and critical illness products for life and health insurance companies
  • Pricing and profit testing of insurance policies
  • Due diligence in M&A of life/health insurance companies

He is a member of the Institute of Actuaries of Japan’s Health Insurance Committee.

Publications

Read their latest work

Article

日本における骨折による介護負担とその推移　―官庁統計を用いた分析

25 February 2019 - by Kosuke Iwasaki
日本における骨折による介護費用を、官庁統計として公開されているデータを用いて推算しました。介護費用は経年的に増加し、平成28年には約2兆円と推算され、家族の介護負担が最も高い割合を示しました。
Article

Analysis of the long term care burden related to bone fractures in Japan –An analysis based on Japanese governmental statistics

25 February 2019 - by Kosuke Iwasaki
We estimated the long-term care expenditures/expense due to bone fractures in Japan using publicly available Japanese government statistical data. The expenses increased over time and were estimated to be about \2 trillion in 2016. Families bore the largest part of the cost burden for long-term care related to fractures.
Article

健康保険給付データの分析に基づく日本における多発性硬化症の罹患率、治療、医療費（英語版のみ）

26 September 2017 - by Kosuke Iwasaki
本稿は、日本における多発性硬化症の現在の治療状況および医療費を検討するため、健康保険給付データを分析したものです。
Article

Prevalence, treatments and medical cost of multiple sclerosis in Japan based on analysis of a health insurance claims database

26 September 2017 - by Kosuke Iwasaki
This article analyzes health insurance claims data to determine the current treatment status and medical cost of multiple sclerosis in Japan.
Article

日本のリアルワールドデータを用いたARB型降圧薬を使用した初期治療後の二次・三次降圧治療の分析（英語版のみ）

01 August 2016 - by Kosuke Iwasaki, Yujiro Otsuka
本調査は、日本の高血圧患者においてARB型降圧薬を使用した初期治療後に処方された降圧剤の併用状況を分析したものです。
Article

Analysis of second- and third-line antihypertensive treatments after initial therapy with an angiotensin II receptor blocker using real-world Japanese data

01 August 2016 - by Kosuke Iwasaki, Yujiro Otsuka
This study examines combination therapies administered following initial therapy with an angiotensin II receptor blocker in hyperintensive Japanese patients.
Article

日本のレセプトデータ分析に基づく多発性硬化症の治療および医療費の現状（英語版のみ）

04 April 2016 - by Kosuke Iwasaki, Yujiro Otsuka
本研究では、レセプトデータベースを利用することで、日本における多発性硬化症の患者集団、治療、費用に関する最新の情報をほぼリアルタイムで提供しています。
Article

Current treatment status and medical cost for multiple sclerosis based on analysis of a Japanese claims database

04 April 2016 - by Kosuke Iwasaki, Yujiro Otsuka
This study provides up-to-date information on the demographics, medical treatment and cost status of multiple sclerosis treatment in Japan in almost real-time by using a claims database.
Article

An actuarial study of hemophilia: Implications for commercial and Medicaid managed care plans

05 March 2014 - by Kosuke Iwasaki, Bruce S. Pyenson
This paper discusses the financial risks associated with hemophilia and outlines the issues for regulators, insurers, and provider organizations financially managing the care for this and other rare and expensive medical conditions.
Article

血友病のアクチュアリアルな研究: 私的健康保険およびメディケイド・マネージドケア・プランへの示唆（英語版のみ）

05 March 2014 - by Kosuke Iwasaki, Bruce S. Pyenson
本紙では、血友病に関する医療費リスクについて論じます。また、規制当局、保険者、そしてサービス提供者が血友病のほか他の稀で費用がかかる病状に対する医療費の管理を検討する際の論点を概説します。