Kenichi Hagiwara
Kenichi Hagiwara (born 26 July 1950 in Omiya, Saitama, Japan), also known as Sho-Ken, was the lead singer of The Tempters, the "bad boys" of the Group Sounds Japan pop scene in the mid and late 1960s. A teen idol with a legion of loyal fans, Hagiwara was known for his good looks and arrogance, which appealed to both young male and female Japanese fans. After The Tempters, he formed the band PYG along with Kenji Sawada, the first true Japanese supergroup, a unit which included members of The Tigers, The Tempters and The Spiders.
Description above from the Wikipedia article Kenichi Hagiwara, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Summer Days Across the River

Betrayal tomorrow

Four Days of Snow and Blood

Memai

The Seburi Story

Summer of Demon

Capone Cries a Lot

Bitterness of Youth

Desert Moon

Kagemusha

Two in the Amsterdam Rain

The Rendezvous

Village of Eight Gravestones

The Triple Cross

Tajomaru: Avenging Blade

The Petrified Forest

Traffic Jam

Night Train

Over Your Dead Body

Oh Seagull, Have You Seen the Sparkling Ocean? An Encounter

Ghost Pub

Yakuza Ladies 3

Light of Africa

To Trap a Kidnapper

The Wanderers

South to the Horizon

Women Who Do Not Divorce

Love Letter

Modori River

Aftermath of Battles Without Honor and Humanity

1750 Days of Turbulence
Kyotaro Nishimura Special: Murder on the ‘Traveling Go’ around Japan.

The Man Who Assassinated Ryoma

Doubles

The Tempters: Smile After Tears

Price of Life

Beyond the Rainbow
The Terrorist’s Parasol

Wet Encounter

Dokonimo nai Kuni

Genroku Ryoran
Ashita e no Chikai

前略おふくろ様

Fighting Girl

水曜ドラマスペシャル

Kamogawa Shokudo

The Drumstick Detective

Wind of the Ryūkyū Islands

Katsu Kaishu

Wounded Angels
