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Masato Shirai

Associate Professor

Juntendo University Hospital

Japan

Research Interests

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Professors in Japan Professors in Epidemiology Epidemiology professors in Japan

About

Masato Shirai is an Associate Professor at Juntendo University Urayasu Hospital in Japan. His research primarily focuses on male sexual dysfunction, including conditions such as delayed ejaculation and erectile dysfunction, as well as testosterone replacement therapy and its impacts. Recent publications reflect his dedication to understanding sexual health issues through nationwide surveys and clinical studies, contributing valuable insights to the field of sexual medicine.

Articles (11)

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2026

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2026

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2026

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2025

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2025

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2025

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2025

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2024

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2023

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2021

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2020

Collaborators (4)

Eri Maeda

Akita University

JAPAN

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Shigeo Horie

Professor and Chairman

Juntendo University Graduate School of Medicine

JAPAN

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Taiki Ogasa

Juntendo University Hospital

JAPAN

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Kazunori Kimura

Nagoya University

JAPAN

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Masato Shirai

Research Interests

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About

Articles (11)

Three Decades of Change in Frequency of Sexual Intercourse and Sexual Function Among Japanese Men: A Comparative National Survey

Dehydroepiandrosterone Sulfate/Cortisol Ratio as a Biomarker of Depressive Symptoms in Late-Onset Hypogonadism: An Analysis of 3,005 Males

U-Shaped Age Pattern of Erectile Dysfunction with Elevated Prevalence in Men in Their 20s Independent of Marital Status: Results from a National Survey in Japan

Prevalence and associated factors of delayed ejaculation: insights from a nationwide internet-based, cross-sectional survey on male sexual dysfunction in Japan

Is Testosterone Replacement Therapy Effective and Safe Even for Eugonadal Men With Symptoms of Late‐Onset Hypogonadism?

Erectile Function and Sexual Activity Are Declining in the Younger Generation: Results from a National Survey in Japan

Prevalence and Factors Associated with Premature Ejaculation in Japan: First Nationwide Cross-Sectional Survey by the Japanese Society for Sexual Medicine

Efficacy of a new vacuum erection device (Vigor 2020) for erectile dysfunction: A retrospective study in Japan

International Prostate Symptom Score and Quality of Life Index for Lower Urinary Tract Symptoms Are Associated with Aging Males Symptoms Rating Scale for Late-Onset Hypogonadism Symptoms

Oral Testofen, L-Citrulline, Resveratrol, and Caffeine Supplement Drink Improves Sexual Function in Men with Phosphodiesterase 5 Inhibitors: Randomized, Double-Blind, Placebo-Controlled Crossover Pilot Study

Tadalafil is sufficiently effective for severe chronic prostatitis/chronic pelvic pain syndrome in patients with benign prostatic hyperplasia

Collaborators (4)

Eri Maeda

Shigeo Horie

Taiki Ogasa

Kazunori Kimura

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