Okinoumi suffered his first loss of the Autumn Grand Sumo Tournament on Monday and fell into a two-way tie for the lead with fellow rank-and-filer Meisei.
The No. 8 maegashira saw the longest winning streak of his top-division career come to a sudden end and he also relinquished sole control of the top spot in the race for the title after falling to No. 5 Ryuden (4-5) on Day 9 of the 15-day meet at Tokyo's Ryogoku Kokugikan.
The 34-year-old veteran charged out of the gates and nearly forced Ryuden over the straw, but lost his balance after being shoved aside and crashed down to his first defeat.