The Saints travel to the Hawthorns tomorrow knowing that they need the three points to get their campaign back on track, and Yoshida believes that his side's greater attacking quality will stand them in good stead.
Although the Baggies have the likes of Saido Berahino, Ideye Brown and Victor Anichebe to choose from, Yoshida feels they are significantly weaker than Southampton.
“They have good strikers, but we have more of them,” he said. “The manager has brought the likes of [Eljero] Elia and Filip [Djuričic] to the club and right now we have something to fix.”
Yoshida's opinion is backed up by the goals that have been scored by the two teams this season, with Southampton netting 38 times compared to the Baggies 24.
However, since Tony Pulis has taken charge of Albion they seem to have improved in that respect - with Ideye, in particular, benefiting from the guidance of the former Stoke City boss.
In the meantime, Southampton seem to have lost form. Graziano Pelle hasn't been able to keep up the standards that he set for himself at the start of the season, while Shane Long has never been a prolific striker at this level.
It is a worry for Southampton, but Ronald Koeman was playing down the importance of it earlier today - with the Dutchman backing his forward line to come good soon.
They will need to do so, too, with the pressure mounting on Southampton to keep pace with the rest of the top-four chasers and finish their very own mission impossible by making it into the Champions League.